_____ is known to us all is that the 2008 Olympic Games will take place in Beijing. [ ]

A. It

B. What

C. As

D. Which

事中控制包括质量活动主体的（）的控制方式。

A.自我控制和他人监控

B.自我控制和他人约束

C.自我约束和他人控制

D.自我约束和他人监控