—How do you know that he has bought MP5?He wrote e-mail to me yesterday.A. a, anB. a

—How do you know that he has bought MP5?
--- He wrote e-mail to me yesterday.
A. a, an
B. an, an
C. a, the
D. the, a

A. a, an(答案→)B. an, anC. a, theD. the, a解析：句意:你怎么知道的他买了一部MP5?——昨天他发了一个电子邮件给我。结合语境可知前后两空都是泛指任何一个，MP5和e-mail的词首音素都是元音，故不定冠词用an，选B。

这个解释是对的

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