问题
选择题
The policeman saw a thief ______ a girl's money on the bus and caught him at once. [ ]
A. stole
B. stolen
C. to steal
D. stealing
答案
答案：D
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The policeman saw a thief ______ a girl's money on the bus and caught him at once. [ ]
A. stole
B. stolen
C. to steal
D. stealing
答案：D