——Do you know?——He is a dentist.A. where he is fromB. where is he fromC. what does his fat

问题补充：

——Do you know?

——He is a dentist.

A. where he is from

B. where is he from

C. what does his father do

D. what his father is

答案：

A. where he is from

B. where is he from

C. what does his father do

(答案→)D. what his father is

解析：英语宾语从句中一般为陈述语序。根据下文，他是一个牙医。可知上文问的是职业，选D，你知道他的父亲是什么（职业）吗？