China’s first manned spaceship “Shenzhou Ⅴ” was sent up into space on October 15 and retur

问题补充：

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

答案：

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。