—Why does the lake smell terrible?—Because large quantit Wap版

试题详情及答案解析

—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

答案：C

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