—Why does the lake smell terrible? —Because large quantities of water . A. have polluted B. is bein...
2023-01-27 16:27:05 105次 2010年昆明第一中学高二下学期期末考试英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—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
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