-Why does the lake smell terrible?-Because large quantities of water .A. have polluted B. is being pollutedC. have been polluted D. has 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 lake smell terrible?

—Because large quantities of water_____.

A. have polluted B. is being polluted

C. have been polluted D. has been polluted

【解析】

试题分析：当“large quantities of+名词”做主语时候，不管名词可数还是不可数，谓语动词都使用复数形式。句义：—为什么湖水闻起来很臭？—因为大量的水都被污染了。根据句意可知使用被动语态，而且要使用现在完成时，表示过去发生的事情对现在的影响。故C正确。

考点：考察主谓一致和时态

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