Question

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

Answer 1

  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。