单项选择题

All the afternoon he worked in his room with the door ______.

A．to lock
B．locking
C．locked
D．lock
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单项选择题
When I caught him ______, I stopped buying things there and started dealing with another shop.
A．cheating
B．cheat
C．to cheat
D．to be cheating
单项选择题
The way she talks is simply intolerable. He objects ______ like a child.
A．to be treated
B．to treat
C．to being treated
D．to treating
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