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 —WhydoestheLakesmellterrible? —Becauselargequantitieso...

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問題詳情:

 —WhydoestheLakesmellterrible? —Becauselargequantitieso...

 —Why does the Lake smell terrible?


 —Because large quantities of water_________.


   A. have polluted                              B. is being polluted 


   C. has been polluted                        D. have been polluted


【回答】

D

知識點:現在完成時及其被動式

題型:選擇題