◎ 题干
He was exhausted because he had________ all night studying.
[     ]
A. showed up        
B. stayed up
C. set up            
D. woken 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“He was exhausted because he had________ all night studying.[ ]A. showed up B. stayed upC. set up D. woken up…”主要考查了你对  【动词短语】【过去完成时】  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。