问题
选择题
He looked around and caught a man _____ his hand into the pocket of a passenger.
A．put
B．to be put
C．to put
D．putting
答案
答案：D
catch sb doing sth表示发觉或当场捉住 sb在做一件事情。
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He looked around and caught a man _____ his hand into the pocket of a passenger.
A．put
B．to be put
C．to put
D．putting
答案：D
catch sb doing sth表示发觉或当场捉住 sb在做一件事情。