The library ______ in the center of the city at present is intended for the public and almost free.

A．built

B．being built

C．being building

D．building

各级公安机关的法制部门是公安机关法制工作和内部执法监督工作的主管部门，其主要职能包括( )。

A．综合职能

B．办案职能

C．执法监督、检查职能

D．审判职能