Đáp án A

Giải thích: câu điều kiện loại 1

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VI.  Make conditional sentences:

1. Keep silent or you’ll wake the baby up.

→ If you don't keep silent, you will wake the baby up.

2. Stop talking or you won’t understand the lesson.

→ If you don't stop talking, you won't understand the lesson.

3. I don’t know her number, so I don’t ring her up.

→ If I knew her number, I would ring her up.

4. I don’t know the answer, so I can’t tell you.

→ If I knew the answer, I could tell you.

5. We got lost because we didn’t have a map.

→ If we had a map, we wouldn't have gotten lost.

6. Susan felt sick because she ate four cream cakes.

→ If Susan hadn't eaten four cream cakes, she wouldn't have felt sick.

8. He lost his job because he was late every day.

→ I couldn't find sentence 7 in the previous search results.

9. Peter is fat because he eats so many chips.

→ If Peter didn't eat so many chips, he wouldn't be fat.

10. Robert got a bad cough because he started smoking cigarettes.

→ If Robert hadn't started smoking cigarettes, he wouldn't have gotten a bad cough.

VII. Rewrite the following sentences:

1. He can’t go out because he has to study for his exam.

→ If he didn't have to study for his exam, he could go out.

2. She is lazy so she can’t pass the exam.

→ If she weren't lazy, she could pass the exam.

3. He will pay me tonight; I will have enough money to buy a car

→ If he pays me tonight, I will have enough money to buy a car.

4. He smokes too much; that’s why he can’t get rid of his cough.

→ If he didn't smoke too much, he could get rid of his cough.

5. She is very shy, so she doesn’t enjoy the party.

→ If she weren't so shy, she would enjoy the party.

6. I will get a work permit. I will stay for another month.

→ If get a work permit, I will stay for another month.

7. He doesn’t take any exercises. He is so unhealthy

→ If he took exercises, he wouldn't be so unhealthy.

8. We can’t get the ticket because I don’t have the right change.

→ If I had the right change, we could get the ticket.

9. Study hard or you won’t pass the exam.

→ If you don't study hard, you won't pass the exam.

10. Don’t be impatient or you will make mistakes.

→ If you are patient, you won't make mistakes.

11. I didn’t eat lunch, I feel hungry now.

→ If I I had eaten lunch, I wouldn't feel hungry now.

12. I only come if they invite me.

→ Unless they invite me, I only come.

13. He didn’t revise all his lessons, he failed the exam.

→ If he had revised all his lessons, he wouldn't have failed the exam.

14. The park is over there, only 5 minutes’ walk.

→ If you walk, the park is only 5 minutes away.

15. Leave me alone or I’ll call the police.

→ Unless you leave me alone, I will call the police.

16. If you arrive at the office earlier than I do, please turn on the air-conditioner.

→ Should you arrive at the office earlier than I do, please turn on the air-conditioner.

17. The children don’t go to school in the snowy weather.

→ If it snows, the children don't go to school.

18. He died so young; otherwise, he would be a famous musician by now.

→ Had he not died so young, he would be a famous musician by now.

19. You must tell me the whole truth or I won’t help you.

→ Unless you tell me the whole truth, I won't help you.

20. The car breaks down so often because you don’t take good care of it.

→ Were I taking good care of it, the car wouldn't break down so often.

21. He is very bad-tempered, that’s why his wife left him soon after marriage.

→ If he weren't so bad-tempered, his wife wouldn't have left him soon after marriage.

22. Don’t tell lies to your boss or you’ll be fired at once.

→ If you tell lies to your boss, you'll be fired at once.

If you don't keep silent you will wake the baby

 If you keep quiet, you won’t wake the baby up.

Keep quiet or you'll wake the baby up.
 If you don’t keep quiet, you will wake the baby up.

Keep quiet or else you'll wake the baby up.
 Unless you keep quiet, you will wake the baby up.

Keep quiet or else you'll wake the baby up.

Chú thích: Unless = If not
 

1.If you don't keep quiet, you will wake the baby.

2.If you keep talking, you won't understand the lesson.

3.If you throw garbage in the river, the water will be polluted.

4. If I knew her number, I would have called her.

5.If I knew the answer, I would tell you.

6.If the water is too dirty, the fish will die.

7.If we don't have a map, we will get lost.

8. If Susan eats four cakes, she will get sick.

9.If the weather wasn't good, we wouldn't have had a picnic.

10.If we keep the water clean, we will have enough water to use in the future.

11.If Peter eats too many sweet potatoes, he might get fat.

12.If you water regularly the plant will grow well.

13. If you don't finish your homework, you won't be able to go out tonight.

14.If they go out, they will help me.

15.If he practices more, he will be able to win the game.

1.Keep quiet or you will wake the baby. → If you don't keep quiet, you will wake the baby.

2.Say no more, and you will understand the lesson. → If you stop talking, you will understand the lesson.

If you don't keep silent, you will wake the baby up

If you don't stop talking, you won't understand the lesson

If I know her number, I will ring her up

If I learn this subject, I will know the answer

If we have a map, we won't got lost

If Susan hadn't eaten 4 cream cakes, she wouldn't have felt sick

If the doctor had tried their best, the patient wouldn't have died

If he hadn't came to work late every day, he wouldn't have lost his job

If Peter doesn't eat so many chips, he won't be fat

If Robert hadn't started smoking cigarettes, he wouldn't have had a bad cough

Choose the best answer for each of the following sentences.
1. In my experiments, the liquid is cooled to 32oF. It always freezes.
A. If you cool the liquid to 32 degrees, it froze.
B. If you cooled the liquid to 32 degrees, it would freeze.
C. If you cool the liquid to 32 degrees, it will freeze.
D. If you had cooled the liquid to 32 degrees, it would have frozen.

2. It may rain this afternoon. I hope it doesn't because I don't want the match to be cancelled.
A. If it rains, the match is cancelled.
B. If it rains, the match will be cancelled.
C. If it rained, the match would be cancelled.
D. If it had rained, the match would have been cancelled.

3. Unfortunately, I don't know Philosophy, so I can't answer your question.
A. If I know Philosophy, I can answer your question.
B. If I know Philosophy, I will be able to answer your question.
C. If I knew Philosophy, I would be able to answer your question.
D. If I had known Philosophy, I would have been able to answer your question.

4. ______ there are some more ideas, we can end the meeting now.
A. If
B. As if
C. Unless
D. In case

5. If he ______ with us now, he _____ the beauty of nature of the National Park.
A. is / can enjoy
B. was / will enjoy
C. has been / would enjoy
D. were / could enjoy

6. If they had searched more carefully, they _____ the watch sooner.
A. will find
B. would find
C. found
D. would have found

7. If I had got up early, I _______ to have breakfast now.
A. have
B. had
C. would have
D. would have had

8. I cannot buy a new computer ____ I save enough money.
A. if
B. even if
C. unless
D. as if

9. Most people you meet will be polite to you ______ .
A. if you are polite to them
B. if you will be polite to them
C. unless you are polite to them
D. if you were polite to them

10. If you do so, it _____ the matter worse.
A. makes only
B. would only make
C. will only make
D. had only made

11. You ______ English fluently unless you practice it every day.
A. will speak
B. will not speak
C. can speak
D. did not speak

12. Hurry up ______ you will miss the bus and be late for school.
A. if
B. and
C. or
D. as

13. You will get a good seat if you ______ first.
A. come
B. came
C. have come
D. will come

14. Sam will not graduate _______ .
A. if he passed all the tests
B. if he does not pass all the tests
C. unless he passes all the tests
D. unless he had passed all the tests

Exercise 6 : Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she 2.If you_____to me, you wouldn’t have got so much trouble. A. listened B. would listen C. had listened D. Would have listened 3.If you don’t know how to spell a word, you_____ look it up in the dictionary. A. must B. will C. should D. ought 4.If the sun _____, we _____for a walk. A. shines / will go B. shone / will go C. shone / would go D. had shone / would go 5.The campfire _____ if it _____ last night. A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains 6.But for our parents, we _____ successful in life. A. will never be B. would never be C. wouldn’t have be D. would have never been 7.If I _____ my wallet at home this morning, I _____ money for lunch now. A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had 8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do. A. were / would know B. is / will know C. had been / would have known D. was / would know 9.If we _____ the plans carefully, we would not have had so many serious mistakes. A. study B. had studied C. studied D. were studying 10.I will never talk to you again _____ you apologize me _____ your being rude. A. if / for B. unless / for C. or / of D. whether / or 11._____if you work harder, you will be sacked. A. Whether B. If C. However D. Unless 12.I think you should stop smoking. A. If I am you, I will stop smoking. B. If I were you, I will stop smoking. C. If I were you, I would stop smoking. D. If I had been you, I would stop smoking. 13.If you take the ice out of the fridge, it _____. A. vaporizes B. melts C. heats D. disappears 14.We should do something to protect water from being polluted _____we will have nothing to drink in the future. A. if B. whether C. or D. unless 15.Let’s knock on their door to see _____home. A. if they’re B. unless they’re C. whether they were D. if they were 16.Unless we _____more snow, we can’t go skiing. A. will have B. have C. have had D. had 17.You’ll fail the exam _____ you start revising. A. if B. until C. when D. unless 18.Unless you wash the car, you _____not drive it at the weekend. A. would B. could C. have to D. may 19.If Peter _____his car before the drive, he _____the problem of out of petrol. A. checked / will not get B. had checked / would not have got C. checks / will not have got D. would be checking / will not have got 20.He stepped on the mine, and it exploded. A.If he doesn’t step on the mine, it doesn’t explode. B.If he doesn’t step on the mine, it won’t explode. C.If he didn’t step on the mine, it wouldn’t explode. D.If he hadn’t stepped on the mine, it wouldn’t have exploded. 21. In my experiments, the liquid is cooled to 32ºF. It always freezes. A.If you cool the liquid to 32 degrees, it froze. B.If you cooled the liquid to 32 degrees, it would freeze. C.If you cool the liquid to 32 degrees, it will freeze. D.If you had cooled the liquid to 32 degrees, it would have frozen. 22.It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled D. If it had rained, the match would have been cancelled. 23.Unfortunately, I don’t know Philosophy, so I can’t answer your question. A.If I know Philosophy, I can answer your question. B.If I know Philosophy, I will be able to answer your question. C.If I knew Philosophy, I would be able to answer your question. D.If I had known Philosophy, I would have been able to answer your question. 24._____ there are some more ideas, we can end the meeting now. A. If B. As if C. Unless D. In case 25.If he _____with us now, he _____ the beauty of nature of the National Park. A. is / can enjoy B. was / will enjoy C. has been / would enjoy D. were / could enjoy 26.If they had searched more carefully, they...the watch sooner. A. will find B. would find C. found D. would have found 27.If I had got up early, I _____ to have breakfast now. A. have B.I had C. would have D. would have had 28.I cannot buy a new computer _____ I save enough money. A. if B. even if C. unless D. as if 29.Most people you meet will be polite to you _____. A. if you are polite to them B. if you will be polite to them C. unless you are polite to them D. if you were polite to them 30.If you do so, it _____ the matter worse. A. makes only B. would only make C. will only make D. had only made 31.You _____ English fluently unless you practice it every day. A. will speak B. will not speak C. can speak D. did not speak 32.Hurry up _____ you will miss the bus and be late for school. A. if B. and C. or D. as 33.You will get a good seat if you _____ first. A. come B. came C. have come D. will come 34.Sam will not graduate_____. A. if he passed all the tests B. if he does not pass all the tests. C. unless he passes all the tests D. unless he had passed all the tests. 35.If I had time, I would go with you. A.I am free and surely go with you. B.I am too busy to go with you. C. I will go with you because I have time. D. I am free enough to go with you. 36.If Margaret hadn’t been wearing a seat belt, she.... Injured. A. has been B. would has been C. would be D. would have been 37.If I _____ the rain yesterday, I_____ ill. A. had not caught / would have been B. had not caught / would have not been C. have not caught / were not D. have not caught / would have been 38.He looked frightened as if he _____ a ghost. A. sees B. is seeing C. has seen D. had seen 39.What _____if there _____ a serious nuclear accident. A. will happen / was B. happens / were C. would happen / were D. would happen / had been

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Choose the best answer for each of the following sentences. 1._____have enough apples, she’ll make an apple pie this afternoon. A.Should she B. If she C. Will she D. Unless she

2.If you_____to me, you wouldn’t have got so much trouble.

A. listened B. would listen C. had listened D. Would have listened

3.If you don’t know how to spell a word, you_____ look it up in the dictionary.

A. must B. will C. should D. ought

4.If the sun _____, we _____for a walk.

A. shines / will go B. shone / will go C. shone / would go D. had shone / would go

5.The campfire _____ if it _____ last night.

A. wouldn’t be cancelled / hadn’t rained B. wouldn’t have been cancelled / hadn’t rained C. would have been cancelled / hadn’t rained D. will be cancelled / rains

6.But for our parents, we _____ successful in life.

A. will never be B. would never be C. wouldn’t have be D. would have never been

7.If I _____ my wallet at home this morning, I _____ money for lunch now.

A. leave / will have B. didn’t leave / would have C. hadn’t left / would have D. hadn’t left / would have had

8.It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.

A. were / would know B. is / will know C. had been / would have known D. was / would know

9.If we _____ the plans carefully, we would not have had so many serious mistakes.

A. study B. had studied C. studied D. were studying

10.I will never talk to you again _____ you apologize me _____ your being rude.

A. if / for B. unless / for C. or / of D. whether / or