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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 229

— When______ you______ the smart hat?
— While my parents were waiting for the plane at the airport.
A. did, buy B.do,buy C.were,buying

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—Whenyouthesmarthat?—Whilemypa