21. ---- Shall I tell John about it? 　　

　 ---- No, you _________. I've told him already.

　 A. needn't　　　　　 B. wouldn't　　　　　　　　 C. mustn't　　　　　 D. shouldn't

20. Don't you remember that we _________ to the cinema tonight?

　 A. would go　　 　　 B. go　 　　　　 　C. are going　　 　 D. will be gone

19. As a girl, she _________ get up at six every day.

　 A. would　　 　　　　　 B. will　 　　　 　C. might　 　　　　 　D. should

18. I did not call to make my airline reservation (预订) but I _________.

　 A. should have　　　 B, may have　　　　　　　 C. must have　　　　 D. shall have

17. If you were in an English-speaking country, you, too, _________ English every day.

　 A. will be used to speak　　　　　 　　　　　　 B. will be used to speaking

　 C. must be used to speak　　　　　　　　 D. would be used to speaking

16. She is studying medical science now but she _________ a lawyer.

　 A. used to be　　　　 B. would be　　　　 C. were　　　 D. had been

15. You are their teacher. You _________ care of them.

　 A. should to take　　　 B. might to take　　　　　　 C. ought to take　　　　 D. need to take

14. How ________ so?

　 A. dare you to say　　 B. dare you say　　　　 C. do you dare say　　　 D. dare to say

13. He had known the matter before you told him, so you _________ have told it to him.

　 A. mustn't　　 B. can't　　 　　 C. needn't　　 　　　　　　　 D. shouldn't

12. ---- That must be a mistake.　　　　　　　　　

　 ---- No .it _________ be.

　 A. can't　　 　　 B. isn't able to　 　 　C. can　　 　 D. was able to