问题
选择题
He looked around and caught a man ____ his hand into the project of a passenger.[ ]
A. put
B. to be putting
C. to put
D. putting
答案
答案：D
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He looked around and caught a man ____ his hand into the project of a passenger.[ ]
A. put
B. to be putting
C. to put
D. putting
答案：D