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 ----Whydoesthelakesmellterrible? ----Becauselargequant...

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問題詳情:

 ----Whydoesthelakesmellterrible? ----Becauselargequant...

 ---- Why does the lake smell terrible?


 ---- Because large quantities of water ____________.


       polluted             B. is being polluted       


      C. have been polluted        D. has been polluted 


【回答】

C

知識點:現在完成時及其被動式

題型:選擇題

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