题目内容

I heard him __the door

A. locking
B. to lock
C. lock
D. being locking

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He does nothing but___

A. complaining
B. to complaining
C. complain
D. to complain

I appreciated ______the opportunity to study abroad two years ago.

A. having been given
B. having been
C. to have been given
D. to have given

There is no point ___further.

A. argue
B. to argue
C. arguing
D. being arguing

They stopped ___, but now I’m getting interested.

A. listening
B. to listen
C. listen
D. having listening