—Do you knowman next to Jim?—Yes. He is dentist.A. a; theB. an; theC. the; anD. the; a

问题补充：

—Do you knowman next to Jim?

—Yes. He is dentist.

A. a; the

B. an; the

C. the; an

D. the; a

答案：

A. a; the

B. an; the

C. the; an

(答案→)D. the; a

解析：介词短语修饰前面的名词通常是特指用定冠词the，介绍某个职业，是表示事物的类别要用不定冠词，dentist第一个音是辅音，要用a，故选D。