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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 解析:答案为A.本题考查分词短语作状语的用法.分词作状语.其逻辑主语必须是句子的主语.而本句的主语看似是it,其实它为形式主语.真正的主语为不定式.而不定式省略了逻辑主语for people.所以应用现在分词.又因already.应用完成时. 【查看更多】

     

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


    1. A.
      Having suffered
    2. B.
      Suffering
    3. C.
      To suffer
    4. 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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