问题
选择题
------Who is the guy with a pair of sunglasses?
----He is ______ university student from _______ Island in England.
A．an; an
B．an; a
C．a; an
D．a; a
答案
答案：C
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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