单项选择题

He actually didn't see the man ______ the room, but he heard them ______ in it.

A. to enter, laugh
B. enter, to laugh
C. to enter, laughing
D. enter, laughing
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单项选择题
Because of the complexity of the modem machine, most offices require secretaries ______.
A. to have specified training
B. specified in training
C. to train specifiedly
D. training specified
单项选择题
It is a common theme in many science fiction stories that the world may one day be ______ by outer space invaders.
A. broken in
B. taken over
C. run over
D. filled in
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