IV.
1. B
2. A
3. B
4. A
5. D
6. A
7. C
8. B
9. A
10. A
V.
1. I wouldn't have got wet if had had an umbrella.
2. Unless you leave me alone, I'll call the police.
3. If the weather weren't snowy, we would go to school.
4. If Jack hadn't helped me, I wouldn't have been able to move this table.
5. If you didn't drink too much coffee, you could sleep.
6. If you make me some coffee, I'll give you some sweets.
7. Unless you had told me about Sue's hair, I wouldn't have noticed her.
8. Should you see Peter, tell him he should be here at 8.00.
