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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1936

He switched off the light and was about to leave the classroom and only then ________ to rain heavily.

A.did it begin B.it began
C.does it begin D.it begins
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Heswitchedoffthelightandwasabo