in the qucue for half an hour ,the old man auddenly realized he had left the cheque in the
in the qucue for half an hour ,the old man auddenly realized he had left the cheque in the
发布时间：2020-08-15 01:58:52
in the qucue for half an hour ,the old man auddenly 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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A. Waiting B. To wait (答案→)C. Having waited D. To have waited 解析：有明显的先后关系，故要用V-ing的完成式。