题目内容
用动词的适当形式填空
_____(wait) in the queue for half an hour, Tom suddenly realized that he _____ (leave) his wallet at home.
答案:Having waited;had left
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题目内容
用动词的适当形式填空
_____(wait) in the queue for half an hour, Tom suddenly realized that he _____ (leave) his wallet at home.