问题
选择题
The policeman asked the man _____ at 9:00 last night. [ ]
A. what he is doing
B. what was he doing
C. what he was doing
答案
答案：C
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The policeman asked the man _____ at 9:00 last night. [ ]
A. what he is doing
B. what was he doing
C. what he was doing
答案：C