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

Chọn câu trả lời đúng cho mỗi câu sau.

1. My dog ___ bark unless it is hungry.

​A. don’t​B. won’t

2. Unless you ___ to go to bed early, we should go out.

​A. wants​B. want

3. ___ you don’t slow down, we are going to crash!

​A. If​B. Unless

4. You cannot go into bars ___ you are over 18.

​A. If​B. unless

5. In my country, ____ you cannot speak English, it’s hard to get a good job.

​A. if​B. unless

6. She’ll fail the exam if she ___ study.

​A. if​B. doesn’t

7. We’ll be late ____ we leave soon.

​A. if​B. unless

8. ___ I am not feeling better tomorrow I will go to the doctor’s.

​A. Unless​B. If

9. ____ you do not make the payment in time, your car will be confiscated.

​A. If​B. Unless

10. You will lose your job ___ you change your attitude and become friendlier.

​A. unless​B. If

11. She won’t know the truth ___ you tell it to her.

​A. unless​B. if

12. ____ you arrive early, you’ll be able to meet the customers before the meeting.

​A. Unless​B. If

13. ____ she eats healthy food, she won’t lose some weight.

​A. Unless​B. If

14. They won’t arrive on time ___ they finish the work early.

​A. unless​B. if

15. Will she able to eat some cake ___ I put eggs in it?

​A. unless​B. if

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

Lần sau bn vt thì cách ra cho dễ nhìn nhé~~~~

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

1,  B. unless (= if not)

2, B. stops 

3, D

4, C

5, A

6, C

7, A

8, B

9, B

10, D

11, B

12, A

13, B

14, B

15, C

16, C

17, C

18, C

19, A

20, A

1.B

2.B

3.D

4.B

5.D

6.C

7.B

8.B

9.B

10.D

11.B

12.B

13.B

14.B

15.A

16.C

17.C

18.C

19.D

20.A

Chon dap an:

1. On the way to school this morning I met Mrs. Ngan,......used to be my old teacher

A. whom B. which C. who D. that

2. The morenyou worry about the problem,........serious it will become

A. the most B. the fewer C. the least D. the more

3. My sister used to study in Beijing,.........is the capital city of China

A. that B. whose C. which D. where

4. You'd better bring along a raincoat.....it rains this afternoon

A. as long as B. therefor C. in case D. unless

5. When you go through the customs, your luggage......by a customs officer

A. may check B. may be check C. should check D. may checked

=>Câu này mk thấy hơi lạ

6. Do you believe there is life.....other planets?

A. at B. on C. with D. in

7. I'm sorry for being late. My car.....on the way here

A. broke down B. went out C. broke up D. broke out

8. She told me that she would leave for Thailand......

A. the previous day B. the day before C. the last day D. the next day

Chon trong am:

1. A. category B. dormitory C. temperature D. communicate

2. A. compare B. account C. conserve D. pleasure

Chon dap an:

1. On the way to school this morning I met Mrs. Ngan,......used to be my old teacher

A. whom B. which C. who D. that

2. The morenyou worry about the problem,........serious it will become

A. the most B. the fewer C. the least D. the more

3. My sister used to study in Beijing,.........is the capital city of China

A. that B. whose C. which D. where

4. You'd better bring along a raincoat.....it rains this afternoon

A. as long as B. therefor C. in case D. unless

5. When you go through the customs, your luggage......by a customs officer

A. may check B. may be checked C. should check D. may checked

6. Do you believe there is life.....other planets?

A. at B. on C. with D. in

7. I'm sorry for being late. My car.....on the way here

A. broke down B. went out C. broke up D. broke out

8. She told me that she would leave for Thailand......

A. the previous day B. the day before C. the last day D. the next day

Chon trong am:

1. A. category B. dormitory C. temperature D. communicate

2. A. compare B. account C. conserve D. pleasure

1. if I had locked up my bike, it ..................have been stolen.

a. couldn't b. wouldn't c.would

2. if you ...................hungry, have a sandwich

a. be b. were c. are

3. mum will be angry if she ........................... you doing that.

a.sees b.saw c.had seen

4. I'll phone you ................. I get to the station

a. if b.when c.until

5. I had fallen asleep...................... he got home

a. by the time b.when c.until

6. I................... you if I had known your number

a. would call b.will call c.would have called

7. I put on the heating....... the house would be warm

a. in order b.so that c.in case

8.I wish I ............... more for the exam

a. have studied b.had studied c. wil study

9. I' ll take my umbrella................ it rains

a.so that b.in order to c.in case

10. I wish he ...................... so rude to people

a.wouldn't be b.won't be c.would be

you work hard, you will fail the exams. 

you do not save any money, you will not be able to buy the house. 

you behave yourself, your parents will be very unhappy. 

If you do not have your hair cut, they will not let you in.

you do it carefully, you will feel sorry afterwards. 

you do not ask him first, he won't offer to help. 

you go out more, you will fail ill. 

you take a hat with you, you will be caught in the rain on the way back. 

you do not write it again more carefully, he will not be able to read it. 

you have another look at those lessons, you will get bad marks. 

Chọn B.

Đáp án B. doing => to do.
Ta có cấu trúc S + get + sb + to V: nhờ, yêu cầu ai làm gì
Dịch: Nếu bạn muốn bọn trẻ làm việc nhà, bạn phải làm nó trước đã.