1. The speaker warned the public that they __________ clear the street．
A. should B. must C. would D. could
2. I wonder why the boat ___________ not be repaired at that time．
A. could B. would C. might D. had to
3. The group ___________a new workable plan．
A. might be introducing B. had to be introducing C. introduces D. was introduced
4. The plane ___________off.
A. take B. may have been taken C. may be taking D. was taken
5. They _________ helped，for they don’t look happy．
A. cannot have been B. will not have been C. shall not have been D. haven’t helped
6. The brave girl _____________ be struggling against the disease．
A. can B. ought C. shalln’t D. have to
7. The committee __________ great attempts to relieve the boredom of the work．
A. could have been made B. would have made C. must have made D. need have made 8. I don’t believe you _________ wait here in the rain．
A. need B. could C. must D. can
9. They ___________ an exam．
A. should be taking B. shall take C. must have take D. will be taken
10. You __________ not play the radio so loudly．
A. should B. will C. can D. need
11. He ___________ the case before people could know it.
A. might investigate B. might have been investigating C. might have investigated D. might have been investigated
12. Lincoln said that slavery ___________ be abolished in order to reunite the country．
A. shall B. need C. can D. must
13. He ___________ drop in whenever passing by．
A. shall B. will C. should D. must
14. I think he ________ come up with a better idea．
A. should B. would C. needed D. must
15. You _______ read that book if you don't want to.
A. haven't B. can’t C. mustn't D. needn't
16. The streets are all dry. It______ during the night.
A. can't have rained B. mustn't have rained C. couldn't rain D. shouldn't have rained 17. Where _________ they be learning French?
A. can B. must C. shall D. will
18. These animals ___________ in very hot area．
A. should live B. should be living C. must live D. will live
19. These materials _________ be mixed together．
A. mustn’t B. needn’t C. wouldn’t D. shall not
1. B
2. A
3. A
4. C
5. A
6. A
7. B/C 缺乏具体语境
8. D
9. A
10. A
11. C
12. A
13. B
14. A
15. D
16. A
17. A
18. A
19. A
参考资料：英语牛人团
