What’s his job?-He’s an_________________.(Customs officer/office assistant)

问题描述:

What’s his job?-He’s an_________________.(Customs officer/office assistant)

填 office assistant .因为前边的不定冠词是an.
customs officer ,用 a 不用an
一般情况,只有首字母为元音字母的单词,前边采用an,A、E、I、O、U开头的通常都要用an,当然,也有一些特例,需要单独记忆.