In the past several weeks, many cities in Northern China from heavy fogs and severe cold. A. had suf...
2022-12-04 01:51:14 178次 2013-2014学年北京市石景山区高三上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
In the past several weeks, many cities in Northern
China from heavy fogs and severe
cold.
A. had suffered B.
have been suffering C. were suffered D.
suffered
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