题目内容

【题目】Why does the lake smell terrible?

—Because large quantities of water .

A. have polluted B. have been polluted

C. is being polluted D. has been polluted

【答案】B

【解析】

试题分析:B;考查性数一致。根据分析,可知时态用现在完成时表示一个结果。主语是large quantities of water是一个复数形式,所以谓语动词也应该用复数形式,水污染应该是被污染,所以谓语还应该体现被动语态。句意:——为什么湖水这么难闻?——因为大量的水被污染了。故选B

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