—Why does the lake smell terrible?

—Because large quantities of water_____.

A. have polluted B. is being polluted

C. have been polluted D. has been polluted

 

C

【解析】

試題分析：當(dāng)“l(fā)arge quantities of+名詞”做主語時候，不管名詞可數(shù)還是不可數(shù)，謂語動詞都使用復(fù)數(shù)形式。句義：—為什么湖水聞起來很臭？—因?yàn)榇罅康乃急晃廴玖恕８鶕?jù)句意可知使用被動語態(tài)，而且要使用現(xiàn)在完成時，表示過去發(fā)生的事情對現(xiàn)在的影響。故C正確。

考點(diǎn)：考察主謂一致和時態(tài)

 

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