—How old is the bridge over there?

—Oh, very old. It _____ about three hundred  years ago. [ ]

A. is built

B. was built

C. is building

D. has built

工序作业质量是直接形成工程质量的基础，为达到对工序作业质量控制的效果，在加强工序管理和质量目标控制方面应坚持的要求有( )。

A．预防为主

B．严格审查

C．重点控制

D．记录完整

E．坚持标准