◎ 题干
— Have you heard that              UFO landed on Center Street yesterday?  
—Of course. And _______ alien got out of the UFO and visited the TV station.    
[     ]
A. a; the      
B. the; an    
C. a; an      
D. an; an
◎ 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“—Have you heard that ______ UFO landed on Center Street yesterday?—Of course. And ______ alien got out of the UFO and visited the TV station. [ ]A. a, the B.…”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。