-Why does the river smell terrible-Because large quantities of water ．A．have polluted B．is being pollutedC．has been polluted D．have been polluted 题目和参考答案——青夏教育精英家教网—

题目内容

—Why does the river smell terrible

—Because large quantities of water________．

A．have polluted B．is being polluted

C．has been polluted D．have been polluted

【解析】

试题分析：考查时态。句意：——为什么这条河这么难闻？——因为大量的水已经被污染。根据语境可知，大量的水已经被污染，故用现在完成时态的被动语态，故选D。

考点：时态

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