◎ 题干
— I'm tembly sorry; but I seem       a hole in the rug.  
— Oh, that's all right.  
[     ]
A. burn         
B. to burn  
C. to have burn   
D. to be burning
◎ 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“— I'm tembly sorry; but I seem a hole in the rug.— Oh, that's all right.[ ]A. burnB. to burnC. to have burnD. to be burning…”主要考查了你对  【不定式的完成式】  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。