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    精英家教网 > 高中英语 > 题目详情
    --Why does the lake smell terrible?
    -- Because a large amount of water_______.
    A．have pollutedB．is being polluted
    C．has been pollutedD．have been polluted
    C 

    试题分析：句意：--为什么这个湖这么难闻？--因为很多水已经被污染了。a large amount of+不可数名词做主语的时候，谓语是单数，如果是large amounts of+不可数名词做主语的时候，谓语是复数，所以排除AD，而且从Why does the lake smell terrible?可知这个湖已经被污染了，所以选C。
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