4. I _________(后悔) not finishing my homework yesterday.

3. In China, David Holmes d_______ an interest in teaching English to Chinese students.

2. He was so generous that he d_______a lot of money to the flooded area.

1. -What is Tom busy doing tonight?

　 -He is making p________ for tomorrow's examination.

8. produce　　 9. fresh　　　 10. risk

6. proved/shown　　　 7. result

4. tested　　 5. contribute/lead

20. 解析：选B。“电报上说……”，这一句式常用say, read。

19. 解析：选D。比尔收到Frank发的电报，故选D。

18. 解析：选A。他们管他叫Frank,表示给孩子起名字。