Exercise 1: Choose the best answer to complete each of the following sentences.

1. Do you think there would be less conflict in the world if all people _________ same language.

  A. spoke                  B. speak                       C. had spoken                  D. will speak

2. If you can give me one good reason for your acting like this, ________ this incident again.

  A. I will never mention                                 B. I never mention

  C. will I never mention                                 D. I don't mention

3. Unless you ________ all of my questions, I can't do anything to help you.

  A. answered             B. answer                    C. would answer             D. are answering

4. Had you told me that this was going to happen, I _________ it.

  A. would have never believed                       B. don't believe

  C. hadn't believed                                          D. can't believe

5. If John _________ to go on the trip, would you have gone?

  A. doesn't agree        B. didn't agree               C. hadn't agreed        D. wouldn't agreed

6. I didn't know you were asleep. Otherwise, I __________ so much noise when I came in.

  A. didn't make         B. wouldn't have made    C. won't make          D. don't make

7. If I ________ the same problem you had as a child, I might not have succeeded in life as well as you have.

  A. have                     B. would have                  C. had had                D. should have

8. I _______ you sooner had someone told me you were in hospital.

  A. would have visited         B. visited              C. had visited                 D. visit

9. ________ then what I know today, I would have saved myself a lot of time and trouble over the years.

  A. Had I known         B. Did I know               C. If I know             D. If I would know

10. The lecturer last night didn't know what he was talking about, but if professor Madison _______, I would have listened carefully.

  A. had been lecturing        B. was lecturing            C. would lecture         D. lectured

Task 1: Choose the best answer

1. Do you think there would be less conflict in the world if all people _______the same language?
A. spoke B. speak C. had spoken D. will speak

2. Unless you __________all of my questions, I can’t do anything to help you.
A. answered B. answer C. would answer D. are answering

3. If someone __________ in to the store, smile and say, “May I help you?”
A. comes B. came C. come D. should come
4. “Here’s my phone number”.
“Thanks. I’ll give you a call if I __________some help tomorrow”
A. will need B. need C. would need D. needed
5. If I didn’t work for an accounting firm, I __________in a bank now.
A. work B. will work C. have worked D. would work
6. The death rate would decrease if hygienic conditions __________improved.
A. was B. is C. were D. had been

7. If she __________ him, she would be very happy.
A. would meet B. will meet C. met D. should meet
8. If I had enough money, I__________ abroad to improve my English.
A. will go B. would go C. went D. should have go to
9.The bench would collapse if they __________on it.
A. stood B. stand C. standing D. stands
10. If it __________convenient, let’s go out for a drink tonight,
A. be B. is C. was D. were

1. ................. more help, I could call my neighbor.
A. Needed B. Should I need C. I have needed D. I should need
2. Do you think there would be less conflict in the world if all people ................. the same language?
A. spoke B. speak C. had spoken D. will speak
3. if you can give me one good reason for your acting like this, ................. this incident again.
A. I will never mention B. I never mention
C. will I never mention D. I don’t mention
4. Unless you ................. all of my questions, I can’t do anything to help you.
A. answered B. answer C. would answer D. are answering
5. If someone ................. into the store, smile and say, “May I help you?”
A. comes B. came C. would come D. could come
6. “Here’s my phone number”.
“Thanks. I’ll give you a call if I ................. some help tomorrow”

A. will need B. need C. would need D. needed
7. If I weren’t working for an accounting firm, I ................. in a bank.
A. work B. will work
C. have worked D. would be working
8. The death rate would decrease if hygienic conditions ................. improved.
A. was B. is C. were D. had been

9. The patient could not recover unless he ................. an operation.
A. had undergone B. would undergo C. underwent D. was undergoing
10. If she ................. him, she would be very happy.
A. would meet B. will meet C. is meeting D. should meet

a. have B. would have C. had had D. should have

2. I __________you sooner had someone told me you were in the hospital.

a. would have visited B. visited C. had visited D. visit

3. __________more help, I would call my neighbor.

a. needed B. should I need C. I have needed D. I should need

4. __________then what I know yesterday, I would have saved myself a lot of time and trouble over the years.

a. had I known B. did I know C. If I know D. If I would know

5. Do you think there would be less conflict in the world if all people __________the same language?

a. spoke B. speak C. had spoken D. will speak

6. If you can give me one good reason for your acting like this, __________this incident again.

a. I will never mention B. I never mention

c. will I never mention D. I don’t mention

7. If I had known you were asleep, I __________so much noise when I came in.

a. didn’t make B. wouldn’t have made

c. won’t make D. don’t make

1. If people solve the problem of smoke from vehicles and factories, the air _____ pure and fresh.

A. is

B. was

C. will be

D. would be

2. If you post false information on the Internet, you _____fined.

A. gets

B. got

C. would get

D. will get

3. I believe that if all the people _____ the government’s instructions, we ____COVID-19 from spreading.

A. don’t follow/ will prevent

B. followed/ will prevent

C. follow/ would prevent

D. follow/ will prevent

4. Do you think there would be less conflict in the world if all people _____ the same language?

A. spoke

B. speak

C. had spoken

D. will speak

5. If our schools are still closed because of the pandemic, we _____to study online.

A. wouldn’t

B. would try

C. tried

D. will try

6. If I ____you, I ____many subjects online instead of playing video games.

A. was/ will study

B. am/ will study

C. were/ would study

D. am/ would study

7. If people need more paper, more trees _____.

A. will cut down

B. cut down

C. will be cut down

D. are cutting down

8. My English is not good. If I ___ English well, I ___ able to get a good job in a foreign company.

A. speak/ can be

B. spoke / were

C. speak/ were

D. spoke/ would be

9. If everybody _____to the fight against COVID-19, we will win soon.

A. contribute

B. contributes

C. are contributing

D. is contributed

10. If people protect the forest, a lot of trees _____.

A. will be preserved

B. will preserve

C. preserve

D. would preserve

11. If you were me, what _____?

A. you would do

B. will you do

C. do you do

D. would you do

12. People don’t trust him because he tells lies.

A. If he tells lies, people won’t trust him.

B. If he didn’t tell lies, people would trust him.

C. If he doesn’t tell lies, people will trust him.

D. If he told lies, people wouldn’t trust him.

13. The government limits travel and close contact among people, so we can prevent COVID-19 from spreading.

A. If the government didn’t limit travel and close contact among people, we couldn’t prevent COVID-19 from spreading.

B. If the government doesn’t limit travel and close contact among people, we can prevent COVID-19 from spreading.

C.If the government doesn’t limit travel and close contact among people, we could prevent COVID-19 from spreading.

D. If the government limited travel and close contact among people, we couldn’t prevent COVID-19 from spreading.

14. Wear a face mask when you are with many people, or you will be at risk.

A. If you wear a face mask when you are with many people, you will be at risk.

B. If you don’t wear a face mask when you are with many people, you will be at risk.

C. If you didn’t wear a face mask when you are with many people, you would be at risk.

D. If you don’t wear a face mask when you are with many people, you would be at risk.

18. We/ should/ maintain/ personal space/ avoid/ crowds/ if/ we/ want/ be/ safe/ now.

A. We should be maintained personal space and avoid crowds if we want to be safe now.

B. We should maintain personal space and avoid crowds if we want to be safe now.

C. We should maintain personal space and avoid crowds if we wanted to be safe now.

D. We should maintain personal space to avoid crowds if we want be safe now.

19. Her English/ not/ be/ rusty/ she/ used/ more often.

A. Her English wouldn’t be rusty if she uses it more often.

B. Her English wouldn’t be rusty if she has used it more often.

C. Her English wouldn’t be rusty if she is using it more often.

D. Her English wouldn’t be rusty if she used it more often.

20. If people/ solve/ problem/ smoke from vehicles, the air/ be pure and fresh.

A. If people solved the problem of smoke from vehicles, the air is pure and fresh.

B. If people solve the problem of smoke from vehicles, the air was pure and fresh.

C. If people solve the problem of smoke from vehicles, the air will be pure and fresh.

D. If people solve the problem of smoke from vehicles, the air would be pure and fresh.

Tìm chỗ sai

15. If the students spend more time to do online assignments, they can keep up with the curricula.

16. If you should often wash your hands, you will keep yourself safe from the disease.

17. We all will soon overcome difficulties if everyone tried their best.

I. 1. ........... more help, I could call my neighbor.

A) Needed B) Should I need C) I have needed D) I should need

2. Do you think there would be less conflict in the world if all people ......... the same language?

A) spoke B) speak C) had spoken D) will speak

3. If you can give me one good reason for your acting like this, ......... this incident again.

A) I will never mention B) I never mention C) will I never mention D) I don't mention

4. Unless you ..... all of my questions, I can't do anything to help you.

A) answered B) answer C) would answer D) are answering

5. If someone ......... into the store, smile and say, "May I help you?"

A) comes B) came C) would come D) could come

6. "Here's my phone number".

"Thanks. I'll give you a call if I ........... some help tomorrow".

A) will need B) need C) would need D) needed

7. If I weren't working for an accounting firm, I...... in a bank.

A) work B) will work C) have worked D) would be working

8. The death rate would decrease if hygienic conditions ....... improved.

A) was B) is C) were D) had been

9. The patient could not recover unless he ...... an operation.

A) had undergone B) would undergo C) underwent D) was undergoing

10. If she ............. him, she would be very happy.

A) would meet B) will meet C) is meeting D) should meet

II. 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

1 where ................... you go if you have a car ? a will b are c would d were 2 you will fail the exam , ...........................you study harder a as b if c unless d although 3 if i ............................ a bird , i would be a dove a are b were c am d is 4 if today .............................sunday , we .......................to the beach a is / would go b were / would go c will be / will go d were / will go 5 if it .................... this morning , i will not to out a rain b rained c rains d raining 6 nobody hates you ! it is all in your ......................................... a imagine b imaginary c imagining d imagination 7 i am poor , so i can not buy a car a if i am rich , i can buy a car b if i were rich , i can buy a car c if i were rich , i could buy a car d if i were rich , i will buy a car 8 water these plants or they will die a if you did not water these plants , they will die b if you water these plants , they will die c if i do not water these plants , they will die d if you are watering these plants , they will die 9 where is lan ? _parhaps she is working a she may be working b she can be working c she must be working d she will be working 10 nam will probalby be there a nam is here b nam might be there c she must be there d nam might not be there 11 the house ............................. shakespeare was born is open to the public a where b which c that d when 1 2 a .......................... was a person who went through city streets shouted the latest news a town crier b magician c singer d clown 13 if he spoke english more slowly , she ......................... so many mistakes a will not make b would not make c did not make d made