Exercise 1: Choose the correct answer
1. Without your help, I   the technical problem with my computer the other day.
A. can’t solve        B. couldn’t have solved    C. couldn’t solve    D. weren’t solved
2. She helped us a lot in our project. We couldn’t continue without her. 
A. Unless we had her contribution, we couldn’t continue with the project.
B. But for her contribution, we could have continued with the project.
C. If she hadn't contributed positively, we couldn't have continued with the project.
D. Provided her contribution wouldn't come, we couldn't continue with the project.
3. Unless you                    well-trained, you              to the company.
A. aren't / will never be admitted                             B. aren't / will never admit
C. are / will never be admitted                                    D. are / will never admit
4. ___________more help, I could call my neighbor. 
A. needed        B. should I need        C. I have needed        D. I should need
5. Unless you__________all of my questions, I can’t do anything to help you.
A. answered        B. answer            C. would answer        D. are answering
6. Had you told me that this was going to happen, I____________it.
A. would never have believed                B. don’t believe
C. hadn’t believed                    D. can’t believed
7. George wouldn't have met Mary                  to his brother's graduation party.
A. if he has not gone                     B. had not he gone
C. had he not gone                        D. if he shouldn't have gone
8.         ten minutes earlier, you would have got a better seat.
A. Were you arrived                     B. If you arrived             
C. If you hadn't arrived                 D. Had you arrived
9. If she                  a car, she would go out in the evening.
A.have            B. has                C. has had            D. had
10. The joke would not be funny if it                  into French.
A. has been translated                 B. be translated                   
C. was be translated                     D. were translated
11. We                  on the beach now if we hadn't missed the plane
A. might have lain        B. would lie                    C. could be lying             D. would have lain
12. I think you should stop smoking.
A. If I am you, I will stop smoking.                         B. If I had been you, I would stop smoking,
C. If I were you, I would stop smoking.                      D. If I were you, I will stop smoking.
13. If he had been more careful, he__________                     
A. won't fall                  B. wouldn't fall              C. wouldn't have fallen    D. would haven't fallen
14. His health would be improved________
A. if he continued to smoke heavily                        B. unless he stopped smoking heavily
C. if he gave up smoking                                             D. if only he doesn't smoke any more.
15. He was driving very fast because he didn't know the road was icy.
A. If he knew the road was icy, he wouldn't drive so fast.
B. He hadn't been driving very fast if he would have known the road was icy.
C. If he had known the road was icy, he wouldn't have been driving so fast.
D. He wasn't driving very fast if he would know the road was icy.
16. I didn’t know that you were at home. I didn't visit you.
A. If I knew that you were at home, I would visit you.
B. If I had known that you were at home, I would have visited you.
C. If I knew that you had been at home, I would have visited you.
D. If I would know that you were at home, I visited you.
17. If Nam had passed the GCSE examination, he                 to take the entrance examination to the university.
A. would have been allowed                                   B. would have allowed
C. will have allowed                                                   D. would allow
18. If it had not rained last night, the roads in the city                    so slippery now.
A. would not be                                                       B. must not be
C. could not have been                                                D. would not have been
19. If he                    the lesson yesterday, he could do the test better today.
A. has reviewed                B. had reviewed             C. will review                  D. reviewed
20. If it              warm yesterday, we would have gone to the beach.
A. was              B. were                C. had been             D. could be

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1, B. couldn’t have solved

2, C. If she hadn't contributed positively, we couldn't have continued with the project

3, C. are / will never be admitted

4, B. should I need

5, B. answer

6, A. would never have believed

7, C. had he not gone

8, A. Were you arrived

9, D. had

10, C. was be translated

11, A. might have lain

12, D. If I were you, I will stop smoking

13, B. wouldn't fall

14, A. if he continued to smoke heavily

15, B. He hadn't been driving very fast if he would have known the road was icy

16, D. If I would know that you were at home, I visited you

17, A. would have been allowed

18, B. must not be

19, B. had reviewed

20, C. had been