◎ 题干
He is tired ____working for 12 hours,so he is having a rest.  
[     ]
A. from    
B. out      
C. in      
D. up
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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 is tired____working for 12 hours,so he is having a rest. [ ]A. from B. outC. in D. up…”主要考查了你对  【介词和介词短语】  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。