问题
选择题
Last Sunday was my birthday. My mother bought _______ iPhone4 as _______ birthday present for me.
A．a; a
B．an; a
C．a; an
D．an; an
答案
B
此题考查不定冠词的用法。a用在辅音音素开头的单词之前，an 用在元音音素开头的单词之前。
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