问题
选择题
| _____ in the queue for half an hour, the old man suddenly realized be had left the cheque in the car. |
A. Waiting B. To wait C. Having Waited D. To have waited |
答案
答案：C
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| _____ in the queue for half an hour, the old man suddenly realized be had left the cheque in the car. |
A. Waiting B. To wait C. Having Waited D. To have waited |
答案：C