Question

_______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

 

Answer 1

C

 

考查非谓语动词。题意：老人排队等了半小时之后，这才意识到支票忘在车上了。由于等这一动作是主语主动发出的，应用现在分词形式，又分词短语的动作已经结束，应用其完成式。