题目内容：

*________none of your business.
Awhat he do is
b what he has done is
c what he has done has
d what has he done is

优质解答

B
首先是主语从句,用陈述句语序.排除D,A本身就是一个错误
其次It is none of your business 不关你事.
用的是is 因此选B