On June 16, 2012, it arrested the world’s attention Shenzhou9 spacecraft was successfully sent into the sky with the first Chinese woman astronaut.
A. that
B. what
C. if
D. why
网友回答
(答案→)A. that
B. what
C. if
D. why
解析：本题中的it为形式主语，真正的主语从句位于句尾，通常用关系词that来连接，故本题选A。