单项选择题

He didn' t expect to ______ some of his friends here.

A. run for
B. run over
C. run off
D. run into
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单项选择题
I lay ______ all night yesterday.
A. wake
B. waken
C. awake
D. awaken
单项选择题
The department purchased ______ to simulate conditions in outer space.
A. a new equipment
B. new equipments
C. a new piece of equipment
D. a lot of equipments
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