i don't like the why ___you laugh at her为什么填that?不用on which是不是on which只能引导状语？

i don't like the why ___you laugh at her为什么填that?不用on which是不是on which只能引导状语？
i don't like the why ___you laugh at her为什么填that?不用on which
是不是on which只能引导状语？

i don't like the why ___you laugh at her为什么填that?不用on which是不是on which只能引导状语？
因为 you laugh at her,已经是个完整的句子了,所以不能用on which.加之 于why 连用的从句只能用that.
on which.
The empire on which the sun never sets

that引导后置定语，修饰way的。on which没有这种用法
on which 要看被修饰的搭配
i always went hiking on Sunday on which i have pretty time