Question

【题目】—Why does the lake smell terrible?

—Because large quantities of water __________.

A. have polluted B. is being polluted

C. has been polluted D. have been polluted

Answer 1

【答案】D

【解析】句意:——这湖水怎么这么难闻？——因为湖里大量的水已经被污染了。water与 pollute为被动关系,故排除A项;B项表示“正被污染”，不符合题意，故排除;large quantities of后加名词，谓语动词应用复数形式,故排除C项，答案为D项。