I.

  A. 

1.B

2.C

3.D

4.C

5.C

  B.

1.C

2.A

3.B

4.A

5.C

II.

1.D

2.C

3.B

4.B

5.A

6.C

7.D

8.A

9.C

10.C

III.

1. If he had prepared for the interview, he would have gotten the job.

2. If we hadn’t run out of money, we wouldn’t have come home from our holiday early.

3. If I had enough free time, I could take much exercise.

4. If the fire brigade hadn’t come immediately, the house would have burnt down.

5. If the men hadn’t been all wearing protective clothing, they wouldn’t have been all quite safe.

6. If people realize how important it is to conserve energy, they will do something about it.

7. If I had known how difficult the job was, I wouldn’t have taken it.

8. If my father had earned much money, life would have been easy for us.

9. If Daniel had had enough money, he would have bought the book.

10. If there was truth in her allegations, I would resign.

11. If Andrew had been brave enough, he would have asked Frank Sinatra for his photograph.

12. If I knew something about plumbing, I would fix the leak in the sink myself.