请问,how can you ask such a question as “how much do you earn?” of _英语解答

请问,how can you ask such a question as “how much do you earn?” of my father?
请问,这里为什么用of?

人气：386 ℃　时间：2019-12-07 21:27:24

解答

a question of my father
a question of sb为固定结构