# Bài Tập Tiếng Anh 10 Unit 3: People’s Background Có Đáp Án – Mai Lan Hương

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Bài Tập Tiếng Anh 10 Unit 3: People’s Background Có Đáp Án-Mai Lan Hương. Các bạn xem bài tập có key ở dưới.

UNIT 3​​  PEOPLE'S BACKGROUND

I. ​​ Choose the word that has the underlined letter (s) pronounced /e / or/  ​​ ​​​​ /.

1.a. father b. education c. background​​  d. career

2.a. private​​  b. shy c. hard d. rare

3.a. brilliant​​  b. tragic c. hatred​​  d. mature

4.a. death​​  b. year c. receive d. teacher

5.a. prevent​​  b. grade c. determine d.​​ English

II. Complete the passage with correct form of the words from the box

 force  ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ determine  ​​​​ possible start  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ write  ​​ ​​ ​​ ​​​​ physic physic  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ final  ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ educate  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ establish​​

Elizabeth Blackwell was born in England in 1821 and (1) ...................to New York City when she was ten​​ years old. One day she decided that she wanted to become a doctor. That was nearly (2)..............for a woman in the middle of the nineteenth century. After (3).....................many letters seeking admission to medical schools, she was (4).................​​ accepted by a doctor in Philadelphia. So (5)..................was she that she taught school and gave music lessons to earn money for​​ her​​ tuition.

In 1849, after graduation from medical school, she decided to further her (6)............... in Paris. She wanted to be a surgeon, but a serious eye​​ infection (7)............... her to abandon the idea.

Upon returning the United States, she found it difficult (8)................. her own practice because she was a woman. By 1857, Elizabeth and her sister, also a doctor, along with another female doctor, managed to open a new hos­pital, the first for women and children. Besides being the first female​​ (9).................. in the United States and founding her own hospital, she also (10).............. the first medical school for women.

III. Add a sentence with the past perfect, using the notes.

1.Claire looked very suntanned when I saw her last week.

She had just been on holiday.​​ (just/ be on holiday)

2.We rushed to the station, but we were too late.

​​ (the train/ just/ go)

3.I didn't have an umbrella, but that didn't matter.

(the rain/ stop)

4.When 1 got to the concert hall. they wouldn't let me in.

(forget/ my ticket)

5.Someone got the number of the car the raiders used.

(steal' it' a week before)

6.1 was really pleased to see Rachel again yesterday.

​​ (not see/ her/ for ages)

7.Luckily, the flat didn't look too bad when my parents called in.​​

(just/ clean / it)

8.The boss invited me to lunch yesterday, but I had to refuse the invitation..

9.The man sitting next to me on the plane was very nervous.

​​ (never/ fly/ before)

10.We rushed to the cinema last night, but we were too late.

IV. Put the verbs in the past perfect or past simple.

1. ​​ went to the box office at lunch time, but they...................(already/ sell) all the tickets.

2. ​​ I felt very tired when I got home, so I ..................... (go) straight to bed.

3.I felt better by the summer, but the doctor warned me not to do too much. I ........ (be) very ill.

4. At last the committee were ready to announce their decision. They............ (make) up their mind.

5. 'Was Tom at the party when you arrived?' 'No, he .................(go) home.'

6. Sorry I'm late. The car ................ (break) down on my way here.

7. I ................... (take) the book back to the library when I ....................(read) it.

8.The house was very quiet when I................(get) home. ​​ Everybody............... (go) out for dinner.

9.​​ After she ................. (fill) the basket.................. ​​ (go) to the check out.

10. Yesterday morning I........................ (remember) the answer t the question. Bob............... (ask) me the night before, so I ................... (phone) him.​​

11. Las night, I........................ (go) to Jim’s room and ................. (knock) on the door but there ............. (be) no answer. Either ​​ he ​​ ........................ (go) out or he ..................... (not want) to see anyone.​​

12. Angel asked me how to use the photocopier. She .................... (never/ use) it before, so she................ (not/ know)​​

14.Karen ...................... (not want) to come to the cinema with us be cause she.............. (already/ see) the film. When the students..............(do) the experiment, they what to do.

13. ​​ Two days a go I................ (meet) an old friend who I ................ (not see) for years ................. (write) a report on it.

V. All of the sentences have one verb in the wrong tease. Cross and correct them.

2.I was pleased to see my old. friends​​ last week​​ as ​​ we didn’t see each other​​ since we finished our course ​​ ...................

3. We have to wait for hours at the​​ airport because the bad weather had de layed ​​​​ all the flights ...............

4.We missed our train, so by​​ the time​​ we​​ reached the theater, the play ended and the audience was leaving​​ the theater ..................

5.At the end of their meal they found they couldn't pay the bill because they didn't bring any money with them .............

6.The children were thrilled when they unwrapped the electric toys. but when they discovered that nobody bought a battery they were very disappointed .............

7.When I came out of the cinema I had found that a thief had taken my car radio................

8.At first the authorities thought the athlete had been taking drugs, but they soon realized they mixed up the results of the tests................

9.When the film star came into the restaurant I didn't recognize her because . I didn't see any of her film........

10.When we reached the city center we couldn't find a parking space, so we had decided to go by bus the next time................

VI. Choose the correct form of the verbs.​​

A young man walked into a supermarket in Southampton and (1)​​ put/ had​​ put a few items​​ of food in a basket. He (2)​​ chosen-had chosen​​ a time when not many people (3)​​ shopped/​​ were shopping​​ in the store. He (4)​​ found​​ / had​​ found a checkout where no one else (5)​​ had waited/ was waiting. When the cashier (6)​​ checked/ had checked​​ the goods, the man (7)​​ gave/ was giving,​​ her a £10 note. When she (8)​​ was opening/ opened​​ the till, the man quickly (9)​​ snatched/ had snatched​​ ail the money from it and (10)​​ ran/ had ​​ run,​​ out of the store. before she (11)​​ had realized/ realized​​ what (12)​​ was happening / happened. At the time the security guard (13)​​ stood/ was standing​​ at the Other end of the store. When staff (l4)​​ checked/ had checked​​ the records in the till, they (15)​​ had found/ found that the thief (16)​​ took / had taken​​ only £4.37. As he (17) left/ had left​​ the £10 note behind, the operation (18)​​ cost/ had ​​​​ cost him £5.63.

1. 'Was Tom there when you arrived?' Yes, but he ...............home soon afterwards’.

a. goes b. went c. had gone d. were going

2.Before Jennifer won the lottery, she..............any kind of contest.

a. hasn't entered​​  b. doesn't enter c. wasn't entering​​  d. hadn't entered

3.'Who was the woman in red dress? Did you ​​ know?​​

‘No. I..........." who she was. I.............. her before.

a. didn't know/ hadn't seen b. didn't know/ hasn't seen

4.Did you say that you ..................... here only three days ago?

a. were coming b. had come c. have come d. come

5.By the time he arrived at the party, all his classmates......................

a. has left b. left c. was leaving d. had left

6.When I was a child.......................the violin.

a. I was playing b. I had played c. I play d. I played

7.It's two years...............Joe.

a. that I don't see b. that I haven't seen

c. since I didn't see d. since I saw

8.The man sitting next to me on the plane was nervous because​​ he................. before.

a. hasn't flown b. didn't fly c. hadn't flown​​ d. wasn't flying

9.They................... in Scotland for ten years. Now they live in London.

a. lived b. have lived c. has been living​​ d. had lived

10.As soon as Laura ..................... the house, it started to rain.

a. has left b. was leaving c. had left had been leaving

11.Sorry we're​​ late, we ...................... the wrong turning.

a. had taken b. were taking c. took d. are taking

12.We .......................... in New York for ten years and then we ...........here in 1987.

a. have lived/ moved b. lived / moved

13.When Martin........................the car. he took it out for a drive.

a. had repaired b. has repaired c. repaired d. was repairing

14.We ..................... them before the reception ​​ yesterday

a. haven't met b. hadn't. met c. didn't meet​​  d wouldn't meet

15.Karen didn't want to come to the cinema with us because she ............. the film.

VIII. Read the following article. Put a circle the letter of the correct word or words to use​​ in each blank.

The man who made and lost a fortune (1).............. kitchen furniture is back in business again. 37-year-old Timothy Lind law is now designing (2) ...............for offices - from the director’s suit to the secretarial office.

Lind law had always had a lot of good ideas. After he (3).....................a highly successful computer business for two years, he started his second business in a small garage, selling and installing kitchen furniture. He (4)............... his first million pounds by the time he was thirty. Then he went on to earn over five million in three years.​​

But, after (5).......... with the managers of his company, he suddenly dismissed them. Within six months the business had gone bankrupt. And so (6).................. Lind law. I had made five million pounds before things (7).............. to go wrong, he said. 'I was just Unlucky to lose it later. All companies​​ (8)................ through good times - and through bad times. Now​​ (9).................​​ several lessons which I'll never forget.'​​

He said that he (10).....................to call his new company 'Office-fit' and was already very successful. Office Fit’ and was already very successful.​​

1. a. manufacture​​  b. manufacturing c. to manufacture​​  d. manufactured​​

2.a. furniture b. furniture c. some furniture​​  d. a furniture

3.a. has run b. runs c. was running d. had run

5.a. quarrel​​  b. quarrelling​​  c. quarreled d. have quarreled

6.a. has​​  b. does​​  c. did d. had

7.a. have begun​​  b. began​​  c. begin d. would being

8.a. went b. have one​​  c. had gone d. go

9.a. I learn​​  b. I've learned c. I learned​​  d. I’d learned

10.a. had decided​​  b. was deciding​​  c. decided d. has decided

IX. Read the following passage, then choose the correct answer - true, false, or no information - for each of the sentences below.

The great English scientist Isaac Newton. whose theory of gravitation is well-known throughout the world, was born in the little village Wool Thorpe, not far from his own town of Cambridge, on December 25th, 1642. His father was a farmer who died when Newton was fourteen years old. His mother. uncle and grandmother took care of him.

When still young. Newton was more of a mechanic than a scholar: His neighbors thought he would probably become a well-known clockmaker, be­cause he had already made a clock his neighbours had never heard of before. It worked by water. Besides the water clock Newton also made a sundial. When he grew older, he became interested in mathematics and physics. His first physical experiment was carried out in 1658, when he was .16 years old.. On Jane 5th, 1661 Newton entered the University of Cambridge where he studied mathematics and soon became famous at the age of 21.

When Newton was 22 years old, he began studying the theory of gravitation. In 1669 he was appointed professor and began giving​​ lectures on mathemat­ics at Cambridge. Isaac Newton died in 1727​​ at the ace of 85.

1.Newton was not a physics, he was a mathematician.

a. Trueb. False ​​ c. No information

2. He was born in the town of Cambridge.

a. True b.. False c. No information

3. When he was young he was very intelligent​​

a. True b. False c. No information

4. ​​ He wasn't very interested in mathematics until he grew older.

a. True b. False c. No information

5. ​​ His first physical experiment was carried out when he was not yet twenty.

a. Trueb. Falsec. information

6. Newton's Laws explained the ​​ between force, mass and movement.

​​ a. Trueb. Falsec. No information

7. He entered the University of Cambridge at the age of 21.​​

a. True​​  b. Falsec. No information

8. He became a professor when he Was not ,et 30.

a. Trueb. Falsec. No information

# TEST FOR UNIT 3

I. PRONUNCIATION

A. Choose the word that has the letter (s) pronounced differently fro the others.​​

1.​​  a. language​​  b. package​​  c. mathematics​​  d. marvelous​​

2.​​ a. chemistry​​  b. prepare​​  c. receive d. degree

3.​​  a. private b. diploma c. guide d. writer

4. a. trouble​​  b. study c. tutor d. subject

5. a. received​​  b. worked c. obtained d. harbored

B. Choose the word whose main stress is placed differently from the others

1. a. background​​  b. careerc. secondaryd. private

2. a. scientificb. atomicc. impossibled. professor​​

3. a. obtainb. determinec. awardd. harbour

4. a. ambitiousb. difficultyc. brilliantd. mature

5. a. educationb. difficultyc. championd. institute

II. VOCABULARY AND EXPRESSION

Choose the one word or phrase - a, b, c or d - that best completes the sentence or substitutes for the underlined word or phrase.

1. Marie Curie was born................November 7, 1867.

a. in. b. from c. at d. on

2. Computer models help to​​ determine​​ whether a particular area is likely to flood.

​​  a. make up b. find out c. take over d. put up

3. Let me give you a little .................................about the president of the company.

a. specialization b. concentration c. background d. degree

4. Jane is always determined to do anything she wants. She's a.....................woman.

a. ambitiousb. strong-willedc. brilliantd. humane

5. He passed his exams with flying​​ colour.

a. successfully b. difficultly c. badly d. easily

6. She​​ harbored her hope of​​ being a teacher.

a.gave up her hope of being a teacher

b.built her hope of being, a teacher

c.had her hope of being a teacher

d.kept her hope of being, a teacher in her mind

7. He behaved like an adult. I think he is more.................... than the other boys at his class.

a. intelligent b. mature c. ambitious d. developed

8. The new road should help ......................traffic problems.

a. raise b. create c. ease d. cause

9. There is no................... explanation for what happened.

a. scientist b. scientific c. scientifically d. since

10. The new surgeon will ...................her post in May.

a. go on b. get over c. take up d. look after

III. GRAMMAR AND STRUCTURE

A. Choose the one word or phrase - a, b, c or d - that best completes the sentence.

1.The man looked familiar. I ................... him somewhere before.

a. saw b. have seen c. had seen d. see

2.Last night a tornado swept through Rockville. It ................. everything in its path.

a. destroyed b. was destroyed​​  c. had destroyed​​  d. has destroyed

3.In spite of.................., we decided to go out.

a. we felt very tired​​  b. feeling tired c. all of us felt tired d. tired

4. When we.........................the bill. we left the restaurant.

5.When the firework....................off, the dog....................away.

a. had gone/ ran b. went/ had run c. went/​​ ran d. went/was running

6.In 1903, Marie became the first woman...................a Doctor of Science degree.

7.The police officer stopped us and asked us where........................

a. were we going​​  b. are we going c. we are going ​​ d. we were going

8. . Annie found the souvenirs ................. she wanted at the gift shop.

a. that b. which c. θ d. all are correct

9.The manager made his employees ................. the computer evening class.

a. attendingb. attendc. to attendd. attendance

10. Marie Curie....................a Nobel Prize in Chemistry in 1911.

a. awarded b. was awarded c. had awarded d. had been awarded

11. Could you please come over? I need you.................the​​ refrigerator.

a. help me moving b. helping me to move

c. to help me to move d. help me to move

12. Martina Hingis................. her first tennis racket at the ​​ age of two

a. picked up b. has picked up​​  c. had picked up​​  d. was picked up

13. John F. Kennedy was the first president of the United States ........................

a. born in the twentieth century​​  b. was born in twentieth century

c. born on the twentieth century​​  d. to be born in the twentieth century​​

14. By the time she was twelve. she a. has already decided

15. in Slovakia. Martina has lived in Switzerland for many ​​ years.

a. To be born b. Born c. Being ​​ born​​  ​​ d. Be ​​​​ born

B. Identify the one underlined word or phrase - A, ​​ B, C or D - that mast be changed for the​​ sentence to be correct.

1.Before she​​ became​​ a film star, she​​ has​​ been​​ a​​ stand up​​ ​​ comedian

AB ​​ CD

2.I'm​​ trying​​ to persuade​​ my sister​​ to drive. ​​ but I can’t get her​​ do​​ it

ABCD

3.After a week,​​ we finally got​​ to​​ Miami,​​ that​​ my aunt​​ lives.

ABCD

4.Since​​ I​​ begin​​ school. I​​ haven't had​​ much spare time.

A B C D

5. ​​ My ​​ mother​​ makes​​ me​​ doing​​ rm.,​​ homework​​ so​​ I can't​​ go out.​​

ABCD

6. My family​​ lived​​ in Hue​​ since​​ 1990 to 1996, but we​​ are now living​​ in​​ Sai Lion.

ABCD

7. Can you​​ tell me​​ where​​ were You​​ born?​​ ​​ Stockholm.

A B C D

8. Computers are​​ often used​​ to control,​​ adjustment,​​ and​​ correct​​ complex​​ industrial​​ operation.

A B C D

9. He​​ spent​​ most​​ of his​​ time​​ to paint​​ in the​​ studio,

A B C D

10. We​​ went​​ to​​ Stan's holiday party​​ last year,​​ hadn't​​ we?

A B C ​​ D

IV. SPEAKING

Choose the sentence or phrase that best completes the dialogue.​​

Tony : (1)_______________________________________________

Ann : In a house near Brighton.

Tony : (2)​​ _______________________________________________​​

Ann : For three years.

Tony : (3)​​ _______________________________________________

Ann : The house we had before was too small. We need somewhere bigger.​​

Tony : (4)​​ _______________________________________________

Ann : I work in a bank.

Tony : (5)​​ _______________________________________________

Ann : I doesn't earn much. Just about £ 15.000 a year.

c. Where you live? d. Where do you live?

2.a. You have lived there for how long? b. How long have you lived there?

​​ c. How many years have you lived there?​​  d. Hoy long do you live there?

3.a. Why did you move?​​  b. ​​ Why you moved?

c. Why did you moved?​​  d. Can you tell me the reason why did you move?

4.a: What do you work'? b. What​​ your job​​ is?

c. What you do'? d. What do you do?

5.a. How much do you earn? b. How much money do​​ you take?

c How about money do you earn? d.​​ Do you earn​​ how much money?

A. Choose the one option - a, b, c or​​ d - that best fits each of the num­bered blank.​​

Marie Curie, the Polish-born French (1) ..................... was a courageous and de‑​​ terminal​​ woman. She left her home for Paris to (2)..................... her interest in science. Living in (3).................. , she still (4).............. to undulate a: the top of her class. She met Pierre Curie (5)......................... after graduation and (6) ​​ …………… him a year later. Together, Pierre and tylarrie (7)...................... the most famous husband-and-wife (8)....................... in science history. They (9)............. the Radioactive elements, Polonium and Radium. They (10).............. the Nobel Prize for Physics in 1903.

1 . a. biologist b. mathematician c. chemist d. physicist and chemist

2.a. follow​​  b. take​​  c. pursue​​  d. satisfy

3.a. poverty b. loneliness c. wealthd. difficulty

4.a. madeb. managed​​  c. harbored​​  d. worked'

5.a. immediately​​  b. soon​​  c. shortly​​  d. rightly

6.a: married b. left c. divorced d. devoted

7.a. built b. organized c. established d. formed

8.a. couple b. partnership c. scientistspartners

9.​​  a. discovered b. inventedc. built d. made d.

10. a. had awarded​​  b. awarded c. were​​ awarded​​  d. were awarding

B. Read the passage, then choose the one best answer ​​ - a, b, c or d.

​​ Personal computers, or PCs, are an important ​​ part of out​​ eve ​​ everyday lives.​​ Many people cannot imagine life without them. One the most important people in making these machines work is Bill Crams.

Bill Gates was born in 1955 in Washington​​ State. He grep up in a rich​​ family. His parents sent him to a private school. There he met his business​​ partner, Paul Alien. When they were in the​​ eight​​ were in the eight grade, they were​​  ere writing programs for business computers and making​​ mores.

In 1973, Gates was accepted at Harvard University. His parents were happy. They thought he would get over his obsession with _ and become a lawyer like his father. Two years later, Gates dropped out​​ of​​ Harvard to work on a computer program with his friend Allen. ​​ They worked eighteen​​ hours a day in 'a dormitory room at Harvard. They were writing the program that would run one of the first personal computers. In 1975, they created a com­pany called Microsoft to sell their product.

Allen became ill with cancer and left Microsoft in 1983. He recovered a few years later and started his own company. Meanwhile, Microsoft became a giant company. By 1990, at the age of thirty-four, Gates was the youngest billionaire in the history of the United States. He was the "King of Software". He achieved his success with a lot of hard work. For more than ten years, he worked sixteen-hour days, seven days a week. He had a dream and the will to succeed. By 1997, he was the richest man in the United States.

1. According to the writer,​​

a.people cannot live without personal computers

b.computers play an important part of our lives

c.Bill Gates invented personal computers

d.Bill Gates is the most important people in computer science

2. The words 'dropped out of in line 10 mean

a. graduated from b. ​​ got over

c. took part in d. stopped taking class at

3. According to the passage,​​

a.Bill Gate's parents wanted him to become a computer programmer.

b.Bill Gates and Paul Allen created Microsoft because they want to sell their program for personal computers

c.Paul Alien left Microsoft because he wanted to start his own company.

d.Bill Gates met his business partner at Harvard.

4. How old was Bill Gates when he became the richest man in the United States?

​​ a. 34 b. 51 c. 42 d. 44

5. Which of the following is not mentioned in the text?

a.In a few years, Microsoft became a very large company.

b.Bill Gates and Paul Allen first wrote programs for business computers when they were about fifteen.

c.Bill Gates earned his success by working very hard.

d.Bill Gates is the richest man in the United States.

VI. WRITING

Choose the sentence (a, b, cd) which is closest in meaning to the
sentence printed before.

1. In spite of her difficult living conditions, she worked extremely hard.

a.She worked very hard in difficult conditions.

b.She worked very hard but she still lived in difficult conditions.

c.She worked very hard even though her living conditions were difficult.

d.She worked very hard because her living conditions were difficult.

2. It was impossible to find Toni anywhere.

a. Torn was unable to go anywhere b. Torn could not be found anywhere.

c. It was possible to find Torn. d. Torn could go anywhere he liked.

3. Fewer people came to the meeting than we had expected.​​

a.Too many people came to the meeting.

b.There were more people at the meeting, than we had expected.

c.There were not enough seats for all people as we had expected.

d.We had expected more people to come to the meeting.

4. The results of the research are not only impressive, but also alarming.

a.The results of the research are not alarming. but impressive.

b.The results of the research are alarming. but not impressive.

c.The results of the research are not either impressive or alarming

d.The results of the research are both impressive and alarming.

5. Mark is not interested in teaching..

a. Mark would like to teach.​​  b. Teaching is not interesting to Mark.

c. Mark didn't think teaching is interesting.​​  d. Mark knows how to teach.

TEST YOURSELF

I. Choose the words that best answer the following questions.

I. Which of the following words has the underlined part pronounced differently?

​​ a. stall b. chat c. talk d. water

2.Which of the following words is stressed on the first syllable?​​

a. entertainb. determinec. harbourd. interrupt

3.Which of the following words is stressed on the second syllable?​​

a. privateb. professorc. purchasesd. educated

4.Which of the following words is stressed on the third syllable?​​

a. impossibleb. developmentc. specialization​​  d. scientific

5.Which of the following words doesn't contain the final /t/ sound?​​

a. workedb. announcedc. screamedd. stopped

II. Choose the one word or phrase - a, b, c or d - that best completes the sentence or substitutes for the underlined word or phrase.

6.Marie Curie harbored the dream of a..............career which was Impos­sible for a woman at that time.

a. science b. scientific c. scientist d. scientifically

7.In 1963 he was appointed.................of history.

a. director b. teacher c. professor d. headmaster

8.The morning's work was constantly...................by phone calls

a. made b. interrupted c. created d. changed

9............... they are tropical birds, parrots can live in temperate or even cold climates.

a. Even though b. In spite of c. Nevertheless​​  d. Despite

10.We got...................the plane at 10.30 and the plane took . on time.

a. in/ off b. on/ up in/ out d. on/ off

11.People are fleeing, the area in​​ panic.

a. excitement b. fear c. -gust d. danger

12...................does it take to get to London from here?

a. How far b. How much c. How often d. How long

13.Before the plane takes off, passengers must .................... their seat belts.

​​  a. fasten b. flee c. emit d. unbind

14.My morning...............is to get up at seven, have breakfast, then leave home at eight.

a. timetable b. habit c. routine d. action

15.She's upstairs​​ EZtttinfir ​​ ready to​​ go out.

a. dressing b. determining c. planning d. preparing

III. ​​ Choose the one option - a, b, c, or d that best completes the sentence.

16.How.........................now? Better than before'?

a. are you feeling​​  b. do you feel c. you are feeling ​​ d. you feel

17.'Do you mind if I borrow a chair'?"..........................Do you need only one?'

a. I'm sorry. b. Not at all. c. Yes, 1 do. d. Yes, I would.

a. tell b. to tell c. telling d. told

19.Professor Kidd ..................... three books since 1999, and she's working on her fourth.

a. has been writing b. has written c. wrote d. writes.

20.She only allows the children.................... television on the weekends.

a. to watch​​  b. watching​​  c. watch d. for watching

21.When Martin..................... the car. he took it out for a drive.

a. was repairing​​  b. has repaired ​​ c. had repaired​​  d. repaired

22.The sun.........................​​ in the East and .................... in the West.

a. rises/ set ​​ b. rises/ sets c. rose/ had set​​  d. has risen/ has set

23.I asked him......................​​ , but he went anyway.

a. not to go b. to not go c. not going​​  d. he doesn't go

24.i remember An............... rode the bus to school with.

a. I b. who I c. which I​​  d. that I

a did give you b. did you give c. you gave​​  d. gave you

IV identify the one underlined word or phrase - A. B. C or D - that must be changed for the sentence to be correct.

26.I'm​​ usually​​ right about the weather.​​ am not​​ I?

A​​  B C ​​ D

27.An​​ old man​​ walking​​ along, the​​ road stopped​​ talking​​ to ​​ us.

A B C D

28. Mike​​ usually​​ drives​​ to work.. but​​ today​​ he​​ walks.

A​​  BCD

29.Hypnosis​​ is sometimes​​ employed​​ as​​ a means of​​ helping​​ people quit​​ to smoke.

A   B  C  D

30.Despite​​ most mushroom are​​ edible.​​ some specie​​ cause​​ serious​​ poisoning.

A  BCD

31.Today​​ we​​ know​​ that the earth is one of nine planets​​ whose​​ orbit​​ the sun.​​

ABC​​  D

32.Do you want to​​ get up​​ by yourself, or would you​​ like​​ me ​​​​ to​​ wake up ​​ you?​​

A B C D

33.I​​ bought​​ this​​ new software​​ for learning​​ Chinese

A​​  BCD

34.Are​​ you ready?​​ It's​​ time​​ we​​ go.

A B C D

35.I'm tired​​ because​​ I'm​​ not used​​ to stay​​ up​​ late.

A  BCD

V. Choose the one option - a, b, c or d - that best fits each of the num­bered blank.

The table tennis match was very enjoyable before (36)..................... . lit a cigarette and ruined the evening. After (37)....................... smoking, they let the cigarette fall on the wooden floor. Unfortunately, they dropped it without​​ putting it out but (38) .................. paid any attention to it. Even the.​​ woman (39)................... next to the man with the cigarette did not notice. Soon, however, there was (40) ................ smoke. Suddenly flames (41).............. up into the air. Someone immediately ran out of the room (42).......................the fire brigade. Two or three men got some buckets of water (43)....................​​ the fire, but it was useless. Everyone in the large hut (44.).............. ....... very frightened. The next moment people rushed towards the main doors. Be­fore the fire brigade arrived, the whole building was on fire. On​​ (45)................the burning building, one of the firemen.​​ succeeded in rescuing an old woman.

36.a. someone b. anyone c. no one d. nobody

37.a. finish b. finishing c. finished d. finishes

38. a. someone​​  b. anyone​​  c. no one​​  d. everyone

39. a. she was b. was​​  c. who was d. she

40. ​​ a lot of​​  b. many​​  c. a few​​  d. a little

41. a. shoot​​  b. shoots​​  c. shot​​  d. shooting

42. a. phone​​  b. phoning​​  c. to phone d. for phoning

43. a. to put out​​  b. they put out.​​  c. putting out​​  d. put out

44. a. was​​  b. were c. has​​  d. have

45. a. enter​​  b. entering​​  c. entered d. he entered

VI. Read the passage, then choose the correct answer - b, c, or d.

Few men have influenced the development of American English to the extent that Noah Webster did. Born in West Hartford, Connecticut. in​​ .1758, ​​ his name has become synonymous with American dictionaries. Graduated from Yale in 1778, he was admitted to the bar in 178i and there after began to practice law in Hartford. Later, when he turned to teaching, he discovered how inadequate the available schoolbooks were for the children of a new and independent nation.

In response to the need for truly American textbook, Webster published A​​ Grammatical Institute of the English Language,​​ a three-volume work that consisted of a speller, a grammar, and a reader. The​​ Compendious Dictionary of the English Language​​ was published in 1806.

In 1807 Noah Webster began his greatest work.​​ An American dictionary u/ the English Language.​​ In preparing​​ the manuscript, he devoted ten years to the study of English and its relationship to other languages. and seven more years to the writing itself. Published in two volumes in 1828.​​ An American Dictionary of the English Language​​ has become the recognized authority for usage in the United States. 'Webster's purpose in writing.​​ it was to demonstrate that the American language was developing distinct meanings, pronunciations, and spelling from those of British English. He is responsible for advancing_ simplified spelling forms:​​ develop​​ instead of the British form​​ developed; theater​​ and​​ center​​ instead of​​ the­atre​​ and​​ center; color​​ and​​ honor​​ instead of​​ color​​ and​​ honor.

46. Which of the following would be the best title for the passage?

a. Webster's Work b. Webster's Dictionaries

c. Webster's School d. Webster's Life

47. How old was Webster when he graduated from Yale?

a. 18 b. 19 c. 20 d. 21

48. Why did Webster write A​​ Grammatical burial&​​ -​​ the English Language?

a.He wanted to supplement his income.

b.There were no books available after the Revolutionary War.

c.He felt that British books were not​​ appropriate for​​ American children.

d.The children did not know how to spell.

49. In how many volumes was .4n​​ American​​ Diction the of the​​ English Lan­guage​​ published?

a. One volume b. Two volumes ​​ c. Three volumes d.. Four volumes

50. According to the author, what was `Webster' purpose in writing An​​ American
Dictionary of the English Language?

a. To respond to the need for new schoolbooks.

b.To demonstrate the distinct development of the E language in America.

c.To promote.​​ spelling forms based upon British models

d.To influence the pronunciation of the English language ​​

ĐÁP ÁN

UNIT 3

I. ​​​​ 1. c  ​​ ​​​​ 2. d  ​​ ​​​​ 3. b  ​​ ​​ ​​​​ 4.​​ a  ​​ ​​ ​​​​ 5. a  ​​ ​​ ​​​​ 6b

II.​​ 1. emigrated  ​​ ​​ ​​ ​​ ​​​​ 3. writing   ​​ ​​ ​​ ​​​​ 5. determined  ​​ ​​ ​​​​ 7. forced  ​​ ​​ ​​ ​​​​ 9. physician

​​ ​​ ​​​​ 2. impossible  ​​ ​​ ​​ ​​​​ 4. finally in  ​​ ​​ ​​​​ 6. education  ​​ ​​ ​​ ​​ ​​​​ 8. to start  ​​ ​​ ​​​​ 10. established

III.​​ 2. The train had just gone.   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 7 .I had just cleaned it.

​​ ​​ ​​ ​​​​ 3. The rain had stopped.  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 8 .I had already eaten my sandwiches

​​ ​​ ​​ ​​​​ 4 .I had forgotten my ticket.   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 9. He had never flown before

​​ ​​ ​​ ​​​​ 5. They had stolen it.a week before  ​​​​ 10. The film had already begun

​​ ​​ ​​ ​​​​ 6 .I hadn’t seen her for ages.​​

IV.​​ 1. had already sold   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 5. had gone

​​ ​​ ​​ ​​ ​​​​ 2. went  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 6. broke

​​ ​​ ​​ ​​ ​​​​ 3. was  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 7.​​ took- had read

​​ ​​ ​​ ​​ ​​​​ 4. had made   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 8. got - had gone

​​ ​​ ​​ ​​​​ 9. had filled - went  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 13. met - hadn’t seen​​

​​ ​​​​ 10. remembered - had asked - phoned  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 14. didn't want - had already seen​​

​​ ​​​​ 11-went-knocked-was-hadgone-didn’twant  ​​ ​​​​ 15. did-wrote

​​ ​​​​ 12. had never used - didn’t know​​

V.​​ 2. didn’t see ->​​ hadn’t seen  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 6. bought had bought

​​ ​​ ​​ ​​​​ 3. have to -> had to  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 7. had found -> found  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​

​​ ​​ ​​ ​​​​ 4. ended ->​​ had ended  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 8. mixed -> had mixed  ​​

​​ ​​ ​​ ​​​​ 5. didn’t bring -> hadn’t brought  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 9. didn’t see -> hadn’t seen

​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 10. had decided decided  ​​​​ .  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​

VI.​​ 1. put   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 6. had checked   ​​ ​​ ​​ ​​​​ 11. Realized  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 16. had taken​​

​​ ​​ ​​ ​​​​ 2. had chosen​​  7. gave   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 12.was happening  ​​ ​​ ​​​​ 17. had left

​​ ​​ ​​ ​​​​ 3. were shopping 8. opened   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 13. was standing  ​​ ​​ ​​ ​​ ​​​​ 18. had cost​​

​​ ​​ ​​ ​​​​ 4. found​​   9. snatched   ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 14. chejcked

​​ ​​ ​​ ​​​​ 5. was waiting​​  10. ran  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 15. found

VII.​​ 1. b  ​​ ​​ ​​​​ 2.​​ d   ​​ ​​​​ 3. a  ​​ ​​ ​​​​ 4.b  ​​ ​​ ​​​​ 5. d   ​​ ​​​​ 6. d  ​​ ​​ ​​​​ 7. d   ​​ ​​​​ 8. c  ​​ ​​ ​​​​ 9. a  ​​ ​​​​ 10. c  ​​ ​​​​ 11.c

​​ ​​ ​​ ​​​​ 12. d  ​​​​ 13. a  ​​​​ 14. b  ​​​​ 15. c​​

VlII.​​ 1. b  ​​ ​​​​ 2. a  ​​ ​​ ​​​​ 3. d  ​​ ​​ ​​​​ 4. c  ​​ ​​​​ 5. b   ​​ ​​​​ 6. d  ​​ ​​ ​​​​ 7. b  ​​ ​​ ​​ ​​​​ 8.d  ​​ ​​ ​​​​ 9. b  ​​ ​​ ​​​​ 10. a

IX.  ​​​​ 1. F  ​​ ​​​​ 2. F  ​​ ​​​​ 3. T  ​​ ​​ ​​​​ 4. T   ​​​​ 5. T   ​​​​ 6. NI  ​​ ​​​​ 7. F   ​​ ​​ ​​​​ 8. T

X.​​ 1. Marie Curie was bom in Warsaw on November 7th, 1867.

​​ ​​ ​​​​ 2. Marie harboured the dream of a scientific career, which was impossible for

a woman at that time.​​

​​ ​​ ​​​​ 3. In 1891, Marie went to Paris to realise her dream at the Sorbọnne.

​​ ​​ ​​​​ 4. She met Pierre Curie in the School of Physics and they got married in 1895.  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 5. In 1903, Marie became the first woman to receive a.PhD from the Sorbonne.​​

​​ ​​​​ 6. In 1906, she took up the position which her husband had obtained at the

Sorbonne.​​

​​ ​​​​ 7. Marie Curie was the first woman in France to be a university professor.

​​ ​​​​ 8. Marie Curie was awarded a Nobel Prize in Chemistiy in 1911.​​

​​ ​​​​ 9. Marie Curie died in Ị934 at the age of 67

TEST FOR UNIT 3

I. ​​ ​​ A.  ​​ ​​​​ 1. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 2. a  ​​ ​​ ​​ ​​ ​​ ​​​​ 3. b  ​​ ​​ ​​ ​​ ​​ ​​​​ 4. c  ​​ ​​ ​​ ​​ ​​​​ 5. b​​

​​ ​​ ​​ ​​​​ B.  ​​ ​​​​ 1. b  ​​ ​​ ​​ ​​ ​​ ​​​​ 2. a  ​​ ​​ ​​ ​​ ​​​​ 3. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 4. c  ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 5. a​​

II. ​​ 1. d  ​​ ​​​​ 2. c  ​​ ​​ ​​​​ 3. a  ​​ ​​ ​​ ​​ ​​​​ 4. c  ​​ ​​ ​​ ​​ ​​ ​​​​ 5. c  ​​ ​​ ​​ ​​ ​​​​ 6. b  ​​ ​​ ​​​​ 7. c  ​​ ​​​​ 8. b  ​​ ​​ ​​​​ 9. a  ​​ ​​ ​​​​ 10. d  ​​​​ 11. b  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 12. c  ​​ ​​​​ 13. b  ​​ ​​​​ 14. c  ​​ ​​​​ 15. a  ​​​​

III.​​ A.  ​​​​ 1. c  ​​ ​​ ​​​​ 2. a  ​​ ​​ ​​​​ 3. b  ​​ ​​ ​​​​ 4. a  ​​ ​​ ​​​​ 5.c  ​​ ​​​​ 6. a  ​​ ​​ ​​​​ 7. d  ​​ ​​ ​​​​ 8. d  ​​ ​​ ​​​​ 9. b  ​​ ​​​​ 10. b  ​​ ​​​​ 11. c ​​

​​ ​​ ​​ ​​ ​​​​ 12. a  ​​ ​​ ​​ ​​​​ 13. d  ​​ ​​ ​​ ​​​​ 14. c  ​​ ​​ ​​​​ 15. b  ​​​​

B.​​ 1. b (had)  ​​ ​​ ​​ ​​​​ 3. c (where)  ​​ ​​ ​​​​ 5. b (do)  ​​ ​​ ​​​​ 7.​​ c​​ (you were)  ​​ ​​​​ 9. g (painting)

​​ ​​ ​​ ​​​​ 2. d. (to do)  ​​​​ 4. b (began)  ​​ ​​ ​​​​ 6. b (from) ​​ 8. b (adjust)  ​​ ​​ ​​ ​​ ​​ ​​​​ 10. c (didn’t)​​

IV.​​ 1. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 2. b  ​​ ​​ ​​ ​​ ​​ ​​​​ 3. a  ​​ ​​ ​​ ​​ ​​ ​​​​ 4. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 5. a

V.​​ A. 1. a  ​​ ​​ ​​​​ 2. c  ​​ ​​ ​​ ​​ ​​ ​​​​ 3. a  ​​ ​​ ​​ ​​ ​​ ​​​​ 4. b  ​​ ​​ ​​ ​​ ​​ ​​​​ 5. c  ​​​​ 6. d ​​ 7. b ​​ 8.  ​​​​ 9.  ​​​​ 10.​​

​​ ​​ ​​​​ B. 1. b  ​​ ​​ ​​​​ 2. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 3. b  ​​ ​​ ​​ ​​ ​​ ​​​​ 4. c  ​​ ​​ ​​ ​​ ​​ ​​​​ 5. d ​​

VI. ​​ ​​ ​​​​ 1. c  ​​ ​​ ​​​​ 2. b  ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 3. d  ​​ ​​ ​​ ​​ ​​​​ 4. d  ​​ ​​ ​​ ​​ ​​ ​​​​ 5. b

TEST YOURSELF​​

I.​​ 1. b  ​​ ​​ ​​​​ 2. c  ​​ ​​ ​​​​ 3. b  ​​ ​​ ​​​​ 4 d  ​​ ​​ ​​​​ 5. c​​

II.​​ 6. b  ​​ ​​​​ 7. e  ​​ ​​ ​​​​ 8. b  ​​ ​​​​ 9. a  ​​ ​​​​ 10. d  ​​ ​​ ​​​​ 11. b  ​​ ​​​​ 12. d  ​​ ​​ ​​​​ 13. a  ​​ ​​ ​​​​ 14. c  ​​ ​​​​ 15. d​​

III.​​ 16. b ​​ 17. b  ​​​​ 18. c  ​​​​ 19. b  ​​ ​​​​ 20. a  ​​ ​​​​ 21. c  ​​ ​​​​ 22. b  ​​ ​​​​ 23. a  ​​ ​​ ​​​​ 24. b  ​​ ​​ ​​​​ 25. d​​

IV.​​ 26. c (aren’t)  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 30. a (Although/ Even though)  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 34. d (went) ​​

​​ ​​ ​​ ​​ ​​​​ 27. d (to talk)  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 31. c (which)  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 35. g (to staying)​​

​​ ​​ ​​ ​​ ​​​​ 28. d (is walking)  ​​ ​​ ​​​​ 32. d (wake you up)​​

​​ ​​ ​​ ​​ ​​​​ 29. d (smoking)  ​​ ​​ ​​ ​​ ​​​​ 33. c (to learn)​​

V.  ​​​​ 36. a  ​​ ​​ ​​ ​​​​ 37. b  ​​ ​​ ​​​​ 38. c  ​​ ​​ ​​​​ 39. c  ​​ ​​ ​​​​ 40. a  ​​ ​​ ​​​​ 41. c  ​​ ​​ ​​​​ 42. c  ​​ ​​​​ 43. a  ​​ ​​ ​​​​ 44. a  ​​ ​​ ​​​​ 45. b​​

VI. ​​​​ 46. a  ​​ ​​ ​​ ​​​​ 47. c  ​​ ​​ ​​​​ 48. c  ​​ ​​ ​​​​ 49. b  ​​ ​​ ​​​​ 50. b