◎ 题干
Yang Liwei,China’s first spaceman,prepared carefully for going to space so that he could be sure of success at his first _________.
A.experimentB.flight
C.attemptD.try
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Yang Liwei,China’s first spaceman,prepared carefully for going to space so that he could be sure of success at his first _________.A.experimentB.flightC.atte…”主要考查了你对  【可数名词及其单复数】【集合名词】【名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。