【习题训练】
1. —Is Simon coming by train?
—He should, but he _________ not. He likes driving his car.
A. may
B. shall
C. need
D. must
2. —Do I have to come back tomorrow?
—Yes, you _________.
A. can
B. may
C. must
D. should
3. Although this _________ sound like a simple task, great care is needed.
A. must
B. may
C. shall
D. should
4. It is usually warm in my hometown in March, but it _________ be rather cold sometimes.
A. must
B. can
C. should
D. would
5. Peter _________ be really difficult at times even though he's a nice person in general.
A. shall
B. should
C. can
D. must
6. John promised his doctor he _________ not smoke, and he has smoked ever since.
A. might
B. should
C. could
D. would
7. There's no light on, they _________ be at home.
A. can't
B. mustn't
C. needn't
D. shouldn't
8. —How about paying a visit to Mr. Hershey our former history teacher?
—Good idea. I will e－mail him today so he _________ know _________ to expect us.
A. shall… why
B. may… when
C. would… why
D. will… how
9. Tom, you _________ leave all your clothes on the floor like this!
A. wouldn't
B. mustn't
C. needn't
D. may not
10. —I think I'll give Bob a ring.
—You _________. You haven't been in touch with him for ages.
A. will
B. may
C. have to
D. should
11. A left luggage office is a place where bags _________ be left for a short time, especially at a railway station.
A. should
B. can
C. must
D. will
12. The room is so dirty. _________ we clean it?
A. Will
B. Shall
C. Would
D. Do
13. I _________ help but tell her the truth.
A. may not
B. mustn't
C. needn't
D. cannot
14. —Must I return the magazine to you right now, Sandy?
—No, you _________. You may keep it until next Wednesday.
A. needn't
B. can't
C. must
D. may
15. —Must I finish the work before five o'clock?
—No. You _________ finish it before eight.
A. mustn't
B. needn't
C. can't
D. can
16. —_________ I fill in the check-in form right now, sir?
—No, you needn't. You can complete it this afternoon.
A. May
B. Can
C. Would
D. Must
17. We _________ keep the new traffic law and learn how to protect ourselves.
A. may
B. should
C. can
D. need
18. Which of the following is not right?
_________
A. Is there any need for you to go there?
B. Does he need any help?
C. The house needs repairing.
D. The garden needs to tidy.
19. My mother _________ make rice dumplings. She'll teach me how to do it.
A. must
B. need
C. should
D. can
20. —Why hasn't our monitor come to school yet?
—He _________ be ill. I'm not sure.
A. will
B. can
C. may
D. must
21. Susan's parents have bought a large house with a swimming pool. It _________ be very expensive.
A. must
B. can
C. mustn't
D. can't
22. Computers _________ process difficult problems very, very quickly.
A. must
B. need
C. should
D. can
23. Cars, buses and bikes _________ stop when the traffic lights change to red.
A. can
B. may
C. must
D. need
24. Students _________ be careful when they do chemical experiments in the lab.
A. can
B. must
C. need
D. may
25. You _________ about it. I will try my best to help you.
A. needn't to worry
B. don't need to worry
C. not need to worry
D. don't need worry
26. You _________ finish your exercise in class. You may do it after class.
A. don't need
B. need to
C. don't have to
D. have to
