China sent up two manned spaceships and they were also great scientific in the world.A. c

问题补充：

China sent up two manned spaceships and they were also great scientific in the world.

A. campaigns

B. surprises

C. achievements

D. discoveries

答案：

A. campaigns

B. surprises

(答案→)C. achievements

D. discoveries

解析：句意：中国发射了两艘载人宇宙飞船，它们也是世界伟大的科学成就。A.战役 B.惊讶，惊喜 C.成就，成绩 D.发现由句意可知选C。