单项选择题

Hospital doctors don't go out very often as their work takes（）their time.

A、 away
B、 over
C、 in
D、 up

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单项选择题
I don't think this room will be big enough to（）all the guests.

A、 contain
B、 hold
C、 keep
D、 swallow
单项选择题
He（）in the army for ten years, and he retired last year.

A、 has served
B、 had served
C、 served
D、 had been serving
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