China sent up two manned spaceships and they were also great scientific ______ in the world.A.campaignsB.surprisesC.achievementsD.discoveries
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C解析试题分析：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。
考点：考察名词词义的辨析。
点评：本题难度较小，只要平时对于单词的记忆够牢固，问题就迎刃而解了。