—Why does the river smell terrible? —Because large quantities of water.A. have pollutedB.

发布时间:2020-08-16 08:00:48


—Why does the river smell terrible?
—Because large quantities of water    .
A. have polluted
B. is being polluted
C. has been polluted
D. have been polluted

网友回答

A. have polluted
B. is being polluted
C. has been polluted
(答案→)D. have been polluted
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