Before he was arrested, he had taken one-month holiday, and stayed in the country with 1

Before he was arrested, he had taken one-month holiday, and stayed in the country with 18-year-old girl, one of his students.
A. a, a
B. an, an
C. a, an
D. an, a

A. a, aB. an, an(答案→)C. a, anD. an, a解析：本题考查冠词。句中a one-month holiday泛指一个月的假期；a 18-year-old girl泛指一个18岁的女孩。句意：在他逮捕之前，他和一个18岁的女孩，是他其中的一个学生在乡下度过了一个月的假期。

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