题目内容

My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.
A．a; aB．a; anC．an; aD．an; an
B
此题考查冠词的基本用法，不定冠词有a和an两种：a用于辅音音素开头的词前，an用于元音音素开头的词前。
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A．aB．anC．theD．/
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