The workers ___ busily when the boss came to look for something she ___ in the office.

A．had worked; had left

B．were working; had left

C．working; had left

D．had worked; left

下列不属于职能式组织结构优点的是( )。

A．项目团队中各成员无后顾之忧
B．项目管理层次相对简单，使项目管理的决策速度、响应速度变得快捷起来
C．有利于项目的专业技术问题的解决
D．有利于公司项目发展与管理的连续性