--Why does the lake smell terrible?    
---Because large quantities of water ______.
A．have pollutedB．is being polluted
C．has been pollutedD．have been polluted
D

試題分析：考查主謂一致。本題屬于主謂一致里特殊用法large quantities of的后面既可以接可數(shù)名詞也可以接不可數(shù)名詞，謂語動(dòng)詞都使用復(fù)數(shù)形式。句意：—為什么這個(gè)湖聞起來很臭？—因?yàn)榇罅康乃家呀?jīng)被污染了。根據(jù)句意說明使用被動(dòng)語態(tài)。而且是已經(jīng)被污染了，也要使用現(xiàn)在完成時(shí)的形式。故D正確。
點(diǎn)評(píng)：特殊的考查點(diǎn)：large quantities of的后面既可以接可數(shù)名詞也可以接不可數(shù)名詞，謂語動(dòng)詞都使用復(fù)數(shù)形式。
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