21. The book is neither yours nor mine. Whose ______ it be?

A. must　　　 B. may　　　　 C. should　　　 D. can

20. The lion is considered the king of the forest as it is a(n) ________ of

courage and power.

A. example　　 B. sign　　　 C. mark　　 D. symbol

19. The Nile River______ flood large areas but now the water ________

produce electricity.

A. used to; is used to　　　　　 B. used to; used to

C. was used to; is used to　　　 D. was used to; used to

18. Yang Mei was badly _______ by your words. You ________ that to her.

A. wounded; should say　　　　 B. injured; mustn’t say

C. hurt; shouldn’t have said　　　 D. hurted; wouldn’t say

17. --- What do you think of the talk given by Yang Liwei?

--- Really wonderful! It’s well worth _______.

A. to listen to　 B. to be listened to　 C. being listened to　 D. listening to

从A、B、C、D四个选项中，选择可以填入空白处的最佳选项。

16. She is on a special ________ to lose ________ weight.

　 A. food; her　　 B. food; X　　　 C. diet; her　　 D. diet; X