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    such heavy pollution already, it may be too late to clean up the river. A. Suffering B. That C. Having suffered D. Suffered 【查看更多】

     

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    _____such heavy pollution already, it may now be too late to clean up the river.

    A.  Having suffered     B. Suffering    C. To suffer     D. Suffered

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    _______ such heavy pollution already, it may now be too late to clean up the river.

    A. Having suffered   B. Suffering  C. To suffer                           D. Suffered

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    ________ such heavy pollution already, it may now be too late to clean up the river.

    A. Having suffered　　 B. Suffering

    C. To suffer　　　 　D. Suffered

     

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    ________ such heavy pollution already, it may now be too late to clean up the river.

    A. Having suffered B. Suffering 　　　 C. To suffer 　　　 D. Suffered

     

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    _______such heavy pollution already, it may now be too late to clean up the river.
    [     ]
    A. Having suffered      
    B. Suffering      
    C. To suffer      
    D. Suffered

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