题目内容
【题目】__________ in the restaurant for half an hour, I suddenly realized I had left my wallet at home.
A. To wait B. Having waited C. Having been waited D. To have waited
【答案】B
【解析】B 句意:我在饭店里等了半个小时后,突然意识到我把钱包落在家里了。用现在分词短语的完成式作状语,分词的动作发生在句子谓语动词的动作之前,B项符合语境语义,其余选项均不符合题意要求。故答案选B。
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