---Did the actor live alone in his house?

---Yes. He has a wife and two children. But ____ of them lives with him.

A．none

B．all

C．both

D．neither

保证评估效果起关键性作用的因素是（）。

A．评估指标体系

B．评估程序

C．评估指标

D．评估实施者（的素质）