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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1749

He was busy preparing a speech , only _______ once in a while to rise from the table for a tea .

A.stopping B.to stop C.to have stopped D.having stopped
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Hewasbusypreparingaspeech,only