不積跬步，無(wú)以至千里，不積小流，無(wú)以成江海。整理為大家整理了“2020年公共英語(yǔ)一級(jí)單項(xiàng)選擇練習(xí)1”，歡迎閱讀參考！更多相關(guān)訊息請(qǐng)關(guān)注！
    
    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 含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)，在情態(tài)動(dòng)詞的后面用“be +過去分詞”。
    2. D 含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)，在情態(tài)動(dòng)詞must的后面用“be +kept off”表示
    被動(dòng)。注意off不能丟掉。
    3. B 從句子可以判斷用“be+過去分詞(chosen)”表示“被選為”。
    4. A 主語(yǔ)不是動(dòng)作的執(zhí)行者，所以用被動(dòng)語(yǔ)態(tài)。
    5. B 句子的主語(yǔ)是lights和后面的動(dòng)詞turn on/off是被動(dòng)關(guān)系，所以用被動(dòng)語(yǔ)態(tài)。
    從句意判斷用turn off(關(guān)燈)。
    6. D 從句子的主語(yǔ)和謂語(yǔ)的關(guān)系判斷是被動(dòng)關(guān)系，用被動(dòng)語(yǔ)態(tài)。從句子的時(shí)間狀語(yǔ)
    看是一般過去時(shí)，所以用was built。
    7. C unless“除非”，和if not是同義詞，所以前面用被動(dòng)語(yǔ)態(tài)的否定形式。
    8. A 含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)，從對(duì)話后面的句子判斷前面的句子是否定句。
    9. C 主語(yǔ)roads與后面的謂語(yǔ)build之間是被動(dòng)關(guān)系，要用被動(dòng)語(yǔ)態(tài)。含有情態(tài)動(dòng)詞
    的被動(dòng)語(yǔ)態(tài)是在情態(tài)動(dòng)詞的后面用“be+過去分詞”構(gòu)成。
    10. B 從“垃圾不能扔到河里”可以判斷是用mustn't表示“不允許，禁止”。同時(shí)
    本句是被動(dòng)語(yǔ)態(tài)，所以用mustn't be thrown。