Question

【题目】My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.

A. a; aB. a; anC. an; a D. an; an

Answer 1

【答案】B

【解析】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。