【題目】_____in the queue for half an hour, the old man suddenly realized he had left the money in the car.

A. Waiting B. Having waited

C. To wait D. To have waited

【答案】B

【解析】

試題分析：考查分詞做狀語。本句中動詞wait與句子主語the old man構(gòu)成主動關(guān)系，所以使用現(xiàn)在分詞在句中作狀語。而且這是一個已經(jīng)發(fā)生的動作，所以使用現(xiàn)在分詞的完成式having done。句意：排隊等了半個小時，老人突然意識到把錢忘在了車里。故B正確。

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