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【题目】Christopher Columbus was ______explorer from ______European country.

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

【答案】C

【解析】句意:克里斯托弗哥伦布是一个来自欧洲国家的探险家。aan都是不定冠词,修饰可数名词单数形式,表示泛指一个…,an用于元音发音开头的单词前。根据句意可知,这两个空都是表示泛指的,第一个空后explorer是元音/e/开头的,故用an修饰;第二个空后的European的第一个发音是/j/,是辅音,故用a修饰。选C。

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