_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.A.To waitB.

题目简介

_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.A.To waitB.

题目详情

_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.
A.To waitB.Have waitedC.Having waitedD.To have waited
题型:单选题难度:偏易来源:不详

答案

C
考查非谓语动词。句意:已经在队列里等了一个小时,汤姆突然意识到他把钱包忘在家里了。现在分词表示正在进行的伴随性的动作,其逻辑主语是句子的主语,如果分词动作发生在主语动作之前,则要用完成时态的现在分词,故选C。

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