◎ 题干
_____ nearly 400 miles before nightfall, all of us felt exhausted(筋疲力尽). 
[      ]
A. Covering
B. Covered
C. Having covered
D. To be covered
◎ 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“_____ nearly 400 miles before nightfall, all of us felt exhausted(筋疲力尽).[ ]A. CoveringB. CoveredC. Having coveredD. To be covered…”主要考查了你对  【现在分词的完成式】  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。