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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 650

-Why does the Lake smell terrible? 
-Because large quantities of water       .  

A.have polluted B.is being polluted C.has been polluted D.have been polluted
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WhydoestheLakesmellterrible?Be