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    All possible means been tried to stop the air . A. has, polluted B. have, polluting C. have, being polluted D. has, being polluted 【查看更多】

     

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    All possible means ___ been tried to stop the air______.

    A. has, polluted                               B. have, polluting  

    C. have, being polluted                 D. has, being polluted

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    All possible means ___ been tried to stop the air______.

    A．has, polluted

    B．have, polluting

    C．have, being polluted

    D．has, being polluted

     

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