Is this school where you used to study?是什么从句?

Is this school where you used to study?是什么从句? This is the school where I used to study.是不是非限定性定语从句 Is this school you used to study?空白处应填where还是at which,为什么? This is the school where I used to This is where LuXun used to live.这句话是状语从句吗? This is where you belong这是什么从句 This is my school where l study and piay. this is the classroom ____ i used to study before 英语翻译翻译：Is this museum where you used to work?两句都翻译一下, this is where I enter 是什么从句? Is that ()he used to study?为什么填where,而不是填in which,the place, 英语翻译This is where I start to bite my nails.这是什么从句从句分哪些 分别介绍一