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

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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
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
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