15. What would have happened _____, as far as the riverbank?

　　 A. if Bob has walked farther 　　 　　　　　 B. if Bob should walk farther

　　 C. had Bob walked farther　　 　　　　　　　　 D. should Bob walk farther

14. -Will you stay for lunch?

　　 -Sorry, I _____. My brother is coming to see me.

　　 A. mustn’t　　　 　B. can’t　　　　 　 　　 C. needn’t　　　 　　　 D. won’t

13. -Why do you make me do so?

　　 -I am sorry that you _____ do such a thing.

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

12. -Must I take a bus?

　　 -No, you _____. You can walk there.

　　 A. must not　　　　B. don’t　　　　 　　 C. don’t have to　　D. had better not to

11. -Shall I tell Li Ming about the matter?

　　 -No, you _____. He has known about it already.

　　 A. oughtn’t to　 　 B. needn’t　　　　　C. shouldn’t　　　　D. mustn’t

10. Sir, you _____ be sitting in this seat. It is for women or children only.

　　 A. can’t　　　　 　B. oughtn’t to　　　C. won’t　　　　　　D. needn’t

9. The party turned out to be a failure. I would rather _____ it.

　 A. not have attended　　　　　　　　 　　 B. not attend　

　 C. not to attend　　　　　　　　　 　　 D. not to have attended

8. When I was studying at Beijing University, I _____ take a walk along the lake　 every evening.

　 A. will　　　　 　　 B. would　　　　　 　C. could　　　　 　 　　　 D. shall

7. You _____ fail to pass the entrance examination if you don’t study harder.

　 A. shall 　　　　　　　　　 B. could　 　　　　　　　　　　 C. must　 　　　　　　　　　　 D. should

6. You _____ out last night. I called you several times, but nobody answered.

　　A. must have been　　　B. must be　　 　 　　 C. might have been　D. could be