◎ 题干
— You may make more mistakes if your paper is left_______.  
— Thanks a lot. And would you give me some advice on how to polish it?
[     ]
A. being unchecked      
B. to be unchecked        
C. to check        
D. unchecked
◎ 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“— You may make more mistakes if your paper is left_______. — Thanks a lot. And would you give me some advice on how to polish it?[ ]A. being unchecked B. to…”主要考查了你对  【过去分词】  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。