◎ 题干
When you get the paper back, pay special attention to what          .     
[     ]
A. have marked                
B. have been marked      
C. had marked                
D. had been marked
◎ 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“When you get the paper back, pay special attention to what.[ ]A. have markedB. have been markedC. had marked D. had been marked…”主要考查了你对  【现在完成时的被动语态】  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。