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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 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

查看答案和解析>>

_______ 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

查看答案和解析>>

________ 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

 

查看答案和解析>>

________ 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

 

查看答案和解析>>


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