—Could you tell us ______?

—About two weeks. [ ]

A. how often are we going to be away

B. how often we are going to be away

C. how long are we going to be away

D. how long we are going to be away

调查工作的分析与总结是十分重要的环节，文件的（）应由设计单位质量保证体系规定。

A、实施

B、使用

C、管理

D、制定

E、销毁