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

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. If I had enough money, I ................. abroad to improve my English.
A. will go B. would go
C. should go D. should have go to
2. The bench would collapse if they ................. on it.
A. stood B. stand C. standing D. stands
3. If it ................. convenient, let’s go out for a drink tonight.
A. be B. is C. was D. were
4. If you ................. time, please write to me.
A. have B. had C. have had D. has
5. I shouldn’t go there at night if I ................. you.
A. am B. was C. be D. were
6. If I ................. get a pole, I will go fishing.
A. can B. could C. may D. might
7. If you had the chance, ................. you go fishing?
A. did B. may C. would D. do
8. If you a................. choice, which country would you visit?
A. have B. had C. have had D. will have
9. She will accept the offer ................. you persuade her.
A. unless B. because C. provided that D. otherwise
10. ................. he would accompany you on the piano.
A. Supposing he were here B. Because he were here
C. Were he here D. Both A and C

11. He wants to find a job, _________ he had no luck.

A. but B. so C. as D. if

12. Solar energy doesn’t cause __________.

A. pollution B. polluted C. pollute D. pollutant

13. Are you looking forward ___________ my letter?

A. to receive B. to receiving C. received D. receiving

14. "___________” means a piece of land full of rubbish.

A. junkyard B. treasure C. hedge D. stream

15. Dynamite _________ many years ago.

A. has invented B. invented C. was invented D. were invented

16. Mary said to me "Can you speak English?” In reported speech the sentence will be: She asked me _________

A. if I can speak English B. if I could speak English. C. If can I speak English D. If I could speak English?

17. I live very far from school. I wish________

A. I lived far from school. B. I lived close to school. C. I live near the school now. D. I don’t live very far from school

18. If he __________ hard today, can he have a holiday tomorrow?

A. works B. will work C. worked D. would worked

19. Because there _________ no buses, we had to take a taxi.

A. are B. is C. was D. were

20. We plan to ________ this Saturday.

A. go hiked B. go hiking C. go to hike D. go hike

21. I’ll have to buy a map _________ I don’t know this area.

A. if B. because C. when D. because of

22. It is recommended that he __________ this course.

A. took B. takes C. take D. taking

23. He’s running so fast. I __________ catch up with him.

A. cannot hardly B. can hardly C. not hardly D. could hardly

24. It is important that he _________ take the final examination.

A. has to B. have to C. had to D. having to

25. I will be __________if she manages to sell that motorbike at a high price.

A. surprised B. surprise C. surprising D. to surprise

26. Unless you understand. I __________ explain it again to you

A. am B. was C. will D. would

27. If you know where she lives, please let me__________

A. know B. knew C. known D. to know'

28. If he ______ a student, he will get a discount.

A. were B. was C. were D. will be => ???

29. ______ you are interested in this film, don't go to see it at any cost.

A. Unless B. If C. Because D. So

30. If you like that book, I will give it______you as my present.

A. to B. from C. at D. for

31. If you are busy, we ________ this by ourselves.

A. will do B. did C. would do D. doing

32. How about ______ dinner with us on Sunday?

A. to have B. have C. have had D. having

33. My brother is very fond of ______ to pop and rock music.

A. listen B. to listen C. listening D. listens

34. Life today is very different ______ life 50 years ago.

A. to B. from C. with D. at

35. My uncle is a ______. He often does research in his laboratory

. A. science B. scientist C. scientific D. scientists

36. My father arrives in Singapore ______Monday evening.

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

37. John goes to his office every day except Sunday. ______ Sundays he stays at home.

A. On B. At C. In D. From

38. I hope the weather will be nice ______ the weekend.

A. in B. to C. at D. between

39. Would you like ______ to a party on Saturday?

A. come B. coming C. to come D. will come

40. If you don’t study hard , you ______ the exam.

A. failed B. will fail C. fail D. have failed

21-If she …..him,she would be very happy.
A-would meet B-will meet C-is meeting D-should meet

22-If he …..a thorough knowledge of English, he could have applied for this post.
A-had had B-had C-has D-has had

23-If I had enough money,I……abroad to improve my English.
A-will go B-would go C-should go D-should have go to

24-The bench would collapse if they……on it.
A-stood B-stand C-standing D-stands

25-If it……convenient, let’s go out for a drink tonight,
A-be B-is C-was D-were

26-If you……time, please write to me.
A-have B-had C-have had D-has

27-I shouldn’t go there at night if I ….you.
A-am B-was C-be D-were

28-If I …….get a pole, I will go fishing.
A-can B-could C-may D-might

29-If you had the chance,…….you go fishing?
A-did B-may C-would D-do

30-If you …..a choice, which country would you visit?
A-have B-had C-have had D-will have



Trắc nghiệm câu điều kiện từ 31-40
31-She will acept the offer if you persuade her.
A-unless B-because C-provided that D-otherwise

32-If he were here,he would accompany you on the piano.
A-Supposing he were here B-because he were here C-were he here D-Both Aand C

33-If she had gone abroad, she would have let you know.
A-had gone she abroad B-had she gone abroad
C-Because she had gone abroad D-while she had gone abroad

34-Trees won’t grow…….there is enough water.
A-if B-when C-unless D-as

35-……….she agreed, you would have done it.
A-if B-had C-should D-would

36-If he hadn’t wasted too much time , he ……in his examination.
A-would fail B-wouldn’t fail C-wouldn’t have failed D-won’t fail

37-If I had taken that English course, I…….much progress.
A-had made B-would have made C-made D-would make

38-If I were in your place, I….a trip to England.
A-will make B-had made C-would make D-made

39-If you inherited a million pounds,what…….with the money?
A-do you do B-will you do C-would you do D-are you going to do

40-If you……..as I told you, you…….in such predicament now.
A-Did/would not be B-had done/had not been
C-do/would not be D-had done /would not be

1. C

2. D

3. D

4. A

5. A

6. D

7. A

8. B

9. A

10. D

Choose a, b, c or d:

1. If I _______ him this afternoon, I ____ him in the evening.

a. don't see / will phone

b. will not se / phone

c. didn't see / would phone

d. have not seen / am going to phone

2. ________ his best contribution, our team wouldn't have won the game.

a. but for

b. If

c. If only

d. Unless

3. Submit the report to the boss ______ it.

a. unless you would finish.

b. provided that you would finished

c. if you have finished

d. if only you finished

4. Tina's train arrived ahead of schedule. ______ I had decided to go to the train station early, she would have waited there for more then twenty minutes before I arrived.

a. unless

b. if

c. otherwise

d. supposed that

5. I wish _____ at the seaside now.

a I am

b. if only I were

c. I had been

d. I were

14:A
15:C
16:B

17:B

18:A

19:C

20:B

21:B

22:B(take nha bạn)

23:B

24:B

25:A

26:C

27:A

ok rồi đó bạn ạ!

trả lời trên kia rồi nhá bạn ạ!