you have blond hair.yes,it used to be red,____it 1.hasn`t 2.doesn`t 3.didn`t 4.hadn`t

问题描述:

you have blond hair.yes,it used to be red,____it 1.hasn`t 2.doesn`t 3.didn`t 4.hadn`t

选3,didn't

因为陈述部分是过去式,used to be 以前是,这个句式,本身就是过去式,因此是didn't it