◎ 题干
—Look, John's fallen asleep at work!
—Oh, he must have stayed ________late last night.
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Look, John's fallen asleep at work!—Oh, he must have stayed ________late last night.…”主要考查了你对  【现在完成时】【现在完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。