—Why does the lake smell terrible?

—Because large quantities of water ________.

Ahave polluted Bis being polluted

Chas been polluted Dhave been polluted

 

D

【解析】由語境可知水已經(jīng)被污染了,要用現(xiàn)在完成時,排除B項;large quantities of...作主語時,謂語動詞要用復數(shù)形式,排除C項;waterpollute之間存在動賓關系,故此處應用被動語態(tài),排除A項。

 

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