China has successfully launched its Shenzhou Ⅵ with two astronauts in it has shocked the world.
A. What
B. As
C. It
D. That
网友回答
A. What
B. As
C. It
D. That
解析：考察主语从句的连接词。That引导起主语从句，在句中不担当任何成分，也不能省略，只是起引导作用。本题的主语从句That China has successfully launched its Shenzhou Ⅵ with two astronauts in it的句中结构很完整，使用用that引导即可。故D正确。