单项选择题

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

A、 away
B、 over
C、 in
D、 up

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单项选择题
An iron and steel works, with several satellite factories,（）in that city now.

A、 is built
B、 is being built
C、 were built
D、 are being built
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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