18. Mike, you _______ leave all your toys in a mass on the floor like this.

　 A. wouldn’t　　　 B. mustn’t　　 C. needn’t　　 D. may not

17. John _______ pay a visit to me this afternoon, so I don’t want to go out in case he comes.

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

16. She _______ you more help, even though she was very busy.

　 A. might have offered　　 B. might offer　　 C. may have offered　　　 D. may offer

15. Since you have made such good preparations, there ________ be any problem about passing the coming exam.

　 A. mustn’t　　　 B. shan’t　　　 C. shouldn’t　　　　 D. needn’t

14. Generally, Tom is a good boy, but he ______be very annoying.

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

13.- No wonder you are so sleepy. You ________video games for so long.

- I regret having done it now.

　 A. shouldn’t have played　　　 B. mustn’t have played　

C. couldn’t have played　　　　 D. might not have played

12. The murder _________ caused due to his affairs and the police are still looking into it for further information. .

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

11. It’s so late. Where __________ she have gone?

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

10. When we worked in the same office, we _______ often have coffee together.

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

9.-Mary looks very upset. She ______ failed to pass the exam.

-I guess so. It’s very difficult after all.

　 A. should have　　　 B. could have　　 C. must have　　 D. might have