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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 allowed C. is being used, do not pollute D. has been used, to pollute 【查看更多】

     

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

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

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

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