[题目]- Is doctor Wang UNICEF volunteer?- No, he is ORBIS doctor. He has worked for it for years.A. a; an B. an; a C. an; an D. a; a 题目和参考答案——青夏教育精英家教网—

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【题目】— Is doctor Wang _________ UNICEF volunteer?

— No, he is_________ ORBIS doctor. He has worked for it for years.

A. a; an B. an; a C. an; an D. a; a

【答案】A

【解析】

句意：——王医生是一个UNICEF志愿者吗？——不是，他是一个ORBIS的医生，他已经工作了几年了。不定冠词a/an一个，通常用于泛指，a用于辅音因素开头的单词前，an用于元音因素开头的单词前；故选A

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