—Remember how we met for the first time, Dick?

—Of course I do. You _______ to the teachers' office hurriedly and _________ me.

A．had walked; weren't noticing

B．were walking; didn't notice

C．had been walking; noticed

D．walked; had noticed

在建立工程项目分解结构中，识别项目的主要组成部分时应从______和便于项目实施管理方面考虑。

A．可作为独立的交付成果
B．专业分工明确
C．便于编码
D．招标管理