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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1636

_____ we were worried about was _______ they could manage to control the pollution.

A.That; how B.That; whether C.What; that D.What; whether
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wewereworriedaboutwastheycould