__________ 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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__________ 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 |