China sent up two manned spaceships and they were also great scientific _______ in the world.
A．campaignsB．surprisesC．a(chǎn)chievementsD．discoveries
C

試題分析：句意：中國(guó)發(fā)射了兩艘載人宇宙飛船，它們也是世界偉大的科學(xué)成就。A.戰(zhàn)役  B.驚訝，驚喜  C.成就，成績(jī)  D.發(fā)現(xiàn) 由句意可知選C。
點(diǎn)評(píng)：本題難度較小，只要平時(shí)對(duì)于單詞的記憶夠牢固，問(wèn)題就迎刃而解了。
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