China’s first manned spaceship “Shenzhou Ⅴ” was sent up into space on October 15 and returned safely to the earth on October 16, is a great honour for our great motherland.
A. that
B. which
C. what
D. it
网友回答
A. that
(答案→)B. which
C. what
D. it
解析：此题考查关系代词的用法。which引导非限制性定语从句，which在定语从句中作主语，指代前面整个主句。