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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 889

In the past several weeks, many cities in Northern China________from heavy fogs, causing great inconvenience to people.

A.suffered B.have been suffering
C.were suffered D.had been suffered
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Inthepastseveralweeks,manyciti