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

问题补充：

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

答案：

A. a, a

B. an, an

(答案→)C. a, an

D. 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。