— 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：考察主謂一致。large quantities of許多，大量；該短語(yǔ)既可以修飾可數(shù)名詞，也可以修飾不可數(shù)名詞；做主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞使用復(fù)數(shù)形式。本句的主語(yǔ)是large quantities of water，故后面的謂語(yǔ)動(dòng)詞使用復(fù)數(shù)形式。句意：大量的水都被污染了。故D正確。
點(diǎn)評(píng)：固定搭配large quantities of許多，大量；該短語(yǔ)既可以修飾可數(shù)名詞，也可以修飾不可數(shù)名詞；做主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞使用復(fù)數(shù)形式。
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