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  • 更新 2022-09-03
  • 科目 语文
  • 题型 选择题
  • 难度 中等
  • 浏览 458

He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.

A.known to find B.knowing to find C.known finding D.knowing finding
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Hewaspuzzledbythisphenomenon.H