－Why does the river smell terrible? －Because large quantities of water______． A. have been polluted ...
2022-12-03 07:13:35 150次 2013-2014学年河北省高三上学期四调考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
－Why does the
river smell terrible?
－Because large
quantities of water______．
A. have been
polluted
B. is being polluted
C. has been
polluted
D. have polluted
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