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    These rivers should be prevented . A. to be polluted B. from being polluted C. polluting D. being polluted 【查看更多】

     

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    These rivers should be prevented ___________.

       A. to be polluted   B. from being polluted  C. polluting  D. being polluted

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    These rivers should be prevented ___________.

    A．to be polluted

    B．from being polluted

    C．polluting

    D．being polluted

     

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