从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. - Has Li Lin started? He said he would join in the party.
- He ______. He is a man of keeping his word.
A. could have left B. must have left
C. can’t come D. won’t be coming
2. - May I park my car here?
- No, you ______. No car is allowed to park here.
A. may not B. needn’t C. mustn’t D. daren’t
3. - Excuse me, could you tell me where the Yajia Supermarket is?
- It’s two blocks straight ahead. You ______ miss it.
A. mustn’t B. can’t C. needn’t D. shouldn’t
4. - I saw Mr. Sun at Tongyu Station this morning.
- You ______. He’s still on holiday in Hawaii.
A. couldn’t have B. mustn’t have
C. shouldn’t D. needn’t
5. - How about paying a visit to Dr. Wang, our former Chinese teacher?
- Good idea. I will e-mail him today so that he ______ know ______ to expect us.
A. shall; why B. could; when C. would; what D. will; how
6. Everything has two sides. Beautiful songs, sometimes, ______ be just noise to others.
A. must B. may C. should D. could
7. Someone ______ my umbrella. I found it wet yesterday.
A. must be using B. must have used
C. must use D. must have been using
8. - How dangerous it was!
- Yes, but for the passer-by’s quick action, the girl ______.
A. was drowned B. could have been drowned
C. had drowned D. should be drowned
9. You ______ scold such a pupil who always keeps silent so seriously that you ______ hurt him.
A. should; can B. may; will
C. mustn’t; may D. can’t; must
10. - Why does Alice know so much about Angkor Wat?
- She ______ have been there, or ...
A. must B. oughtn’t to C. may D. can’t
11. - You may laugh, but I’ve been thinking of becoming a vegetarian.
- Oh, you ______ be crazy. You will be hungry all the time.
A. must B. may C. will D. need
12. - What’s the matter with you?
- Oh, I’m not feeling well in the stomach. I ______ so much fried fish just now.
A. shouldn’t eat B. mustn’t have eaten
C. shouldn’t have eaten D. mustn’t eat
13. - ______ he have been chosen as captain of the football team?
- Yes, he ______.
A. Can; must have B. Must; must have
C. Can; must D. Must; must
14. Mr. Zhang ______ in Shanghai tomorrow morning.
A. can have arrived B. will have arrived
C. may have arrived D. must have arrived
15. Miss Wang started at 8 o’clock, and she ______ be there now.
A. should B. can C. can’t D. need
16. - It must be Mr. Li who did it.
- No, it ______ be Mr. Li.
A. mustn’t B. wouldn’t C. can’t D. may
17. You ______ finish reading the book as soon as possible.
A. may B. can C. need D. should
18. - Need you go to work now?
- Yes, I ______.
A. must B. need C. can D. dare
19. Your trousers are dirty. ______ them for you?
A. Shall I wash B. Will I wash
C. Am I going to wash D. Am I washing
20. You are late for school today. You ______ to school earlier.
A. ought to come B. should have come
C. ought have come D. should come
21. We must learn from Lei Feng, ______ we?
A. may B. can’t C. don’t D. needn’t
22. She must be hungry, ______ she?
A. isn’t B. needn’t C. doesn’t D won’t
23. He ought to come here early, ______ he?
A. would B. should C. didn’t D. shouldn’t
24. You used to smoke, ______ you?
A. used to B. don’t C. didn’t D. shouldn’t
25. You ought ______ for what you haven’t done.
A. not to be punished B. not be punished
C. to not punished D. to not be punished
26. ______ you please tell me the way to the post office?
A. Must B. Need C. Would D. Should
27. I’m sure he ______ have the computer sooner or later.
A. shall B. can C. must D. would
28. It is important that we ______ learn how to drive.
A. have to B. should C. need D. shall
答案及解析：
1. B。从He is a man of keeping his word中可以看出，李林肯定已经出发来参加聚会了，这是对已经发生的事情非常肯定的推测，故用must have done。注意must表推测时，不能用于否定句和疑问句中。
2. C。此题考查以情态动词提问的一般疑问句的回答。在英语中，以某些情态动词提问的句子，出于礼貌委婉或句意的需要，回答时，要换用另一个情态动词。在回答must开头的一般疑问句时，肯定回答用must，否定回答用needn’t或don’t have to；在回答may开头的一般疑问句时，肯定回答用may，否定回答用mustn’t；在回答need开头的一般疑问句时，肯定回答用must，否定回答用needn’t。
3. B。根据题意，此处需要表示“推测”的否定结构，故can’t为正确答案。
4. A。这是一个省略句，couldn’t have done表示对过去发生的动作的否定推测，意为“不可能……”。
5. B。这是一个综合题。本题so that后的目的状语从句中的谓语动词要用“情态动词（ may / might / can / could ） + 动词原形”。When to expect us表示“我们什么时候可到达”。“疑问词+不定式”结构在句中作know的宾语。
6. B。由sometimes可知，此处应用表示可能性不大的情态动词，即may。
7. B。由后句可知，这是对过去发生的事情的肯定推测，故B项正确。
8. B。but for的意思是“要不是”，语法功能上等同于if 引导的否定虚拟条件句，因前句中How dangerous it was可知应与过去事实相反。
9. C。mustn’t表示“不准许”，may表示可能性，所以C正确。
10. C。句意：她或许到过那里，或者……。or ... 是重要的信息，说明还有其他的可能性。A的说法太绝对，与or ... 提供的信息冲突。
11. A。must表示的把握最大，may表示有可能，need不表示推测，will表示将来。根据句意可知A正确，表明对对方的不理解和责备，语气比较坚决。
12. C。shouldn’t have done 表示“本不该做……，但实际上却做了”。
13. A。疑问句中可以用can, 肯定句用must。
14. B。will + have done，表示对将来必然进程的猜测。
15. A。should 表示主观性猜测，译为“应该”。
16. C。can’t 表示否定的猜测，侧重于主观判断，译为“决不会；不可能”。
17. D。should表示劝告某人应该做某事。
18. A。need引导的一般疑问句，肯定回答应用must。
19. A。Shall I ... ？是征求对方意见时常用的句型。
20. B。should have done表示“过去某件事应该做而实际上没有做”，此处含有责备之意，也可用ought to have come。
21. D。反意疑问句中，当must作“必须”解时，可以用needn’t / mustn’t构成附加疑问句。
22. A。反意疑问句中，陈述部分的must表示对现在情况推测时，附加疑问句中通常依据must后面的动词形式确定助动词。
23. D。反意疑问句中，陈述部分的谓语有ought to 时，附加疑问句中应用shouldn’t 或oughtn’t。
24. C。反意疑问句中，陈述部分的谓语有used to 时，附加疑问句中应用didn’t 或usedn’t。
25. A。ought to 的否定式是ought not to。
26. C。Would you please ... ？是向对方提出请求或询问时常用的婉转而有礼貌的句型。
27. A。主语是第三人称时，shall表示说话人给对方的“允诺；命令；指示；意愿”。
28. B。在It is important / impossible / necessary that ... 句型中，that从句的谓语用“( should + ) 动词原形”。