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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1324

Only when he put his foot into the river________that the water was too cold to swim in.

A.he realized B.did he realize
C.had he realized D.he had realized
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Onlywhenheputhisfootintotheriv