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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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—It’s reported that the new underground line has been completed.
—Yes, but it hasn’t been made clear__________it’s to be opened to traffic.

A.that B.who C.what D.when
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—It’sreportedthatthenewundergr