◎ 题干
— Look, John's fallen asleep at work!
— Oh, he must have ________ late last night.
[      ]
A. waken up  
B. put up
C. taken up  
D. stayed up
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Look, John's fallen asleep at work!— Oh, he must have ________ late last night.[ ]A. waken upB. put upC. taken upD. stayed up…”主要考查了你对  【动词短语】  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。