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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 669

To prevent the river from __________ again, the government ordered that the factory stop running.

A.polluting B.polluted
C.having polluted D.being polluted
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Topreventtheriverfromagain,the