—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(shí),排除B項(xiàng);large quantities of...作主語時(shí),謂語動(dòng)詞要用復(fù)數(shù)形式,排除C項(xiàng);waterpollute之間存在動(dòng)賓關(guān)系,故此處應(yīng)用被動(dòng)語態(tài),排除A項(xiàng)。

 

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