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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 497

The factory ______ its waste into the river, but now it deals with the waste in a new way.

A.used to dump B.is used to dump C.used to dumping D.is used to dumping
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Thefactoryitswasteintotheriver