It’s impolite you to ask one’s private affairs.A. forB. ofC. toD. on

问题补充：

It’s impolite you to ask one’s private affairs.

A. for

B. of

C. to

D. on

答案：

A. for

(答案→)B. of

C. to

D. on

解析：本句是固定句型，形容词impolite是对you 的品格描写，所以用of来完成本句。