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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 202

__________ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.

A.Waiting
B.To wait
C.Having waited
D.To have waited
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inthequeueforhalfanhour,theold