）
典型例题
　 There was plenty of time. She ___.
A. mustn't have hurried　 B. couldn't have hurried　　C. must not hurry　 D. needn't have hurried
　 答案D。needn't have done. 意为"本不必"，即已经做了某事，而时实际上不必要。
　 Mustn't have done 用法不正确，对过去发生的事情进行否定性推断应为couldn't have done, "不可能已经"。 must not do 不可以（用于一般现在时）。

16.10 虚拟语气练习

1. 1.Everything ______ if Albert hadn’t called the fire brigade.
a. a. will be destroyed b. will have been destroyed
b. b. would be destroyed d. would have been destroyed
2. 2.If you hadn’t gone with Tom to the party last night,______.
a. a. you would meet John already b. you won’t have missed John
c. you will have met John d. you would have met John
3. 3.Supposing this ship ______ , do you think there would be enough life jackets for all the passengers?
a. was sinking b. has sunk c. were to sink d. sunk
4. 4.The insects would devour all our crops and kill our flocks and heads, if ______ for the protection we get from insect-eating animals.
a. it is not b. it were not c. were it not d. they were not
5. 5.The teacher suggested that each student ______ a plan for the vacation.
a. made b. make c. makes d. will make
6. 6.Frankly, I’d rather you ______ anything about it for the time being.
a. do b. don’t do c. didn’t do d. will not do
7. 7.After the way she treated you, if I ______ in your place.
a. be b. am c. was d. were
8. 8.The idea is that the nation ______ an unmanned spacecraft to explore the planet first.
a. sent b. sends c. send d. must send
9. 9.It’s high time you ______.
a. start to work b. would start to work c. started to work d. had started to work
10. 10.“If I hadn’t practiced when I was younger,” the musician says,“I ______ able to play so well now.”
a. wouldn’t be b. won’t be c. wouldn’t have been d. couldn’t have been
11. 11.It is imperative that you ______ there in person.
a. are b. were c. be d. will be
12. 12.The atomic structure is, ______, a miniature solar system.
a. as it were b. as if they were c. as it were d. as if are
13. 13.We required that the machine parts ______ cast iron.
a. is made of b. be made from c. be made of d. is made by
14. 14.The management urged that the cost of production ______.
a. a. to be further reduced b. was further reduced
b. b. be further reduced d. should further reduced
15. 15.The business is risky. But ______ we would be rich.
a. should we succeed b. we should succeed c. might we succeed d. would we succeed
16. 16.I wish our teacher ______ to give another test. I haven’t got prepared yet.
a. isn’t going b. weren’t going c. will not going d. could have gone⑦⑦文⑦檔⑦共⑦享⑦與⑦在⑦線⑦閱⑦讀⑦
17. 17.I wish I ______ to the movies with you last night.
a. went b. did go c. could go d. could have gone
18. 18.I’d just as soon ______ rudely to her.
a. that you won’t speak b. your not speaking c. you not speak d. you didn’t speak
19. 19.If I ______ in the twenty-first century, I ______ my vacation in a very different way.
a. should live…would spend b. will live ….should spend
c. are living … should have spent d. will be living…would have spent
20. 20.It is required that the machine ______ as frequently as necessary.
a. be oiled b. must be oiled c. is oiled d. will oil
21. 21.His English teacher recommends that he ______ a regular degree program.
a. begins b. begin c. will begin d. is beginning
22. 22.We prefer that the plan ______ before being put into execution.
a. a. is fully discussed b. must be fully discussed
c. be fully discussed d. will be fully discussed
23. 23.What do you think of his proposal that improvements ______ in the old type of vacuum cleaner?
a. be made b. will be made c. would be made d. will have to be made
24. 24.The doctor’s advice is that the patient ______ about his real physical condition.
a. a. be