I gave him a warning,_____ he turned a deaf ear.

问题描述:

I gave him a warning,_____ he turned a deaf ear.
A,of which B,for which C,to that D,to which
要说明为什么

turn a deaf ear to ,当主句后有逗号,从句为非限制性定语从句,只能由which引导非限制性定语从句,that没有这种功能,故选d