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    精英家教网 > 高中英语 > 题目详情
    ------ Why does the lake smell terrible?
    ------ Because large quantities of water _________.
    A．have been pollutedB．has polluted
    C．have pollutedD．has been polluted
    A
    考查主谓一致与语态。large quantities of +名词作主语，位于动词用复数；water与pollute构成被动的关系。所以选择A。
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