◎ 题干
The policeman asked the man ____ at 9 o'clock last night.    
[     ]
A. what he was doing    
B. what he is doing    
C. what was he doing
◎ 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“The policeman asked the man ____ at 9 o'clock last night.[ ]A. what he was doingB. what he is doingC. what was he doing…”主要考查了你对  【过去进行时】【宾语从句】  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。