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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:918

The ________ expression on her face suggested that she _________ the _________ physics problem.

A.puzzling;was puzzled by;puzzled
B.puzzling;be puzzled over;puzzled
C.puzzled;be puzzled by;puzzling
D.puzzled;was puzzling over;puzzling
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Theexpressiononherfacesuggeste