_____in the queue for half an hour,the old man suddenly realized he had left the cheque in the car.
A.WaitingB.To waitC.Having waitedD.To have waited
c
C考查非謂語動(dòng)詞的用法。根據(jù)the old man與wait 之間的關(guān)系,應(yīng)該選擇。.一ing形式;再根據(jù)句意可知,老人是在主句謂語動(dòng)詞“realized”前就“等了(wait)半個(gè)小時(shí)“,有明顯的先后關(guān)系.故要用v一ing形式的完成式。
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