1. I don't think sixteen-year-olds should _____ to go to bars(酒吧).
A. allow
B. be allowing
C. be allowed
D. not allow
2. Attention, please! All the mobile phones _____ during the meeting.
A. must keep off
B. have kept off
C. are keeping off
D. must be kept off
3. —I feel very happy that I _____ to be the host.
—Congratulations!
A. choose
B. am chosen
C. chosen
D. have chosen4. Ba Jin, one of the greatest writers in China, _____ as“People's Writer”.
A. is regarded
B. has regarded
C. is regarding
D. regards
5. —Make sure all the lights _____ when you leave the room.
—OK, I will.
A. turn off
B. are turned off
C. turn on
D. are turned on
6. A big market _____ in our city last year.
A. is built
B. built
C. were built
D. was built
7. We _____ to go into the school unless we are in school uniforms.
A. allow
B. are allowed
C. are not allowed
D. should be allowed
8. —Sixteen-year-olds _____ to drive.
—I agree. They aren't serious enough at that age.
A. shouldn't be allowed
B. should be allowed
C. don't allow
D. are allowed not9. —What should we do first if we want to develop our village?
—A lot of roads _____, I think.
A. must build
B. have to build
C. must be built
D. have built
10. To make our city more beautiful, all the rubbish _____ into the river.
A. needn't be thrown
B. mustn't be thrown
C. can't throw
D. may be thrown
【答案】
1. C 含有情态动词的被动语态，在情态动词的后面用“be +过去分词”。
2. D 含有情态动词的被动语态，在情态动词must的后面用“be +kept off”表示
被动。注意off不能丢掉。
3. B 从句子可以判断用“be+过去分词(chosen)”表示“被选为”。
4. A 主语不是动作的执行者，所以用被动语态。
5. B 句子的主语是lights和后面的动词turn on/off是被动关系，所以用被动语态。
从句意判断用turn off(关灯)。
6. D 从句子的主语和谓语的关系判断是被动关系，用被动语态。从句子的时间状语
看是一般过去时，所以用was built。
7. C unless“除非”，和if not是同义词，所以前面用被动语态的否定形式。
8. A 含有情态动词的被动语态，从对话后面的句子判断前面的句子是否定句。
9. C 主语roads与后面的谓语build之间是被动关系，要用被动语态。含有情态动词
的被动语态是在情态动词的后面用“be+过去分词”构成。
10. B 从“垃圾不能扔到河里”可以判断是用mustn't表示“不允许，禁止”。同时
本句是被动语态，所以用mustn't be thrown。
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