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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 1573

The students were ________ over the ________ problem,listening to the teacher with a ________ expression on their faces.

A.puzzled;puzzling;puzzling B.puzzled;puzzling;puzzled
C.puzzling;puzzling;puzzled D.puzzling;puzzled;puzzling
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Thestudentswereovertheproblem,