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    New technology to make sure that the cars, taxis and trains we use the air. A. is used; not to pollute B. has used; is not polluted C. is being used; do not pollute D. has been used; to pollute [解析]选C.be used to do被用来做--, make sure后为宾语从句.缺少谓语动词.故选C. 【查看更多】

     

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    New technology ________ to make sure that the cars, taxis and trains we use ________ the air．

    [　　]
    A．

    is used; not to pollute

    B．

    has used; is not polluted

    C．

    is being used; do not pollute

    D．

    has been used; to pollute

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    New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.


    1. A.
      is used; not to pollute
    2. B.
      has used; is not polluted
    3. C.
      is being used; do not pollute
    4. D.
      has been used; to pollute

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    New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.

    A. is used; not to pollute       B. has used; is not polluted

    C. is being used; do not pollute     D. has been used; to pollute

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    . New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.

    A. is used; not to pollute       B. has used; is not polluted

    C. is being used; do not pollute     D. has been used; to pollute

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    New technology ____ to make sure that the cars, taxis, buses and trains we use ____ the air.

     

    A. is used ; not to pollute B. has used ; is mot polluted

    C. is being used ; do not pollute　 D. has been used ; to pollute

     

     

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