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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 131

New ways _____ to prevent the river _____.

A.have found out, from polluting
B.have found, from being polluted
C.have been found out, from being polluted
D.have been found, from being polluted
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相关知识点

Newwaystopreventtheriver.A.hav