A1. 2
A2. Тут цифры перепутаны. Правильный ответ would become.
A3. Опять перепутаны. Would live
A4. 4
B1. If I were a famous actor I would spend my money for cherity
C1. If we cut down forests, the air would be fewer fresh.
1. will give, visit
2. won't send, hear
3. phones, will contact
4. will see, fly
5. visit, will go
6. will speak, see
7. will do, comes
8. will go, is
9. will ring, returns
10. rains, will stay
11. will walk, isn't be
12. will come, leaves
13. are, will stop
14. will miss
15. will make, flies
16. will see, start