2022年公共英语一级单项选择练习1 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。留意off不能丢掉。 3. B 从句子可以推断用“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。 从句意推断用turn off(关灯)。 6. D 从句子的主语和谓语的关系推断是被动关系，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认形式。 8. A 含有情态动词的被动语态，从对话后面的句子推断前面的句子是否认句。 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”可以推断是用mustn”t表示“不允许，制止”。同时 本句是被动语态，所以用mustn”t be thrown。