◎ 题干
Look,this is _________ “U” and that is _________ “S”.
[     ]
A. a; a
B. an; an
C. a; an
D. an; a
◎ 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“Look,this is _________ “U” and that is _________ “S”. [ ]A. a; a B. an; an C. a; an D. an; a…”主要考查了你对  【不定冠词(a,an)】  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。