问题

_____ 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

正确答案是：

同类题型

There was no room for you. All the seats______.

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1Please look __ the photo ofmy family.

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We will study in different schools next term . Enjoy your time in the new school ! — __________ .