问题
选择题
16．He looked around and caught a man _______ his hand into the passenger's pocket．
A．put
B．to be putting
C．to put
D．putting
答案
答案：D
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16．He looked around and caught a man _______ his hand into the passenger's pocket．
A．put
B．to be putting
C．to put
D．putting
答案：D