This is the school in which we studied .这其中的in是什么东西,有什么用?

This is the school where I used to This is the school in which I spent three years.This is the school where I spent three years.相同 This is my school. I can( )there. this is the school where/in whicn i studied five years ago.可以变成 that i studied in five ago吗?this is the school where/in whicn i studied five years ago.可以变成this is the school that i studied in five ago吗?或this is the school i stud The village is building a school.I hope it__(finish)before August this year This is the school where I used to study.是不是非限定性定语从句 5.This is the second school ____ I used to work at.填that 还是which? This is the primary school----I shudied three years ago A where B which this is an i school for kids all over the wold快 is（）some German friends visited last week?A.this school where B.this school one C.this the school D.this school E.this the school that this is an i school for kids all over the woldthis is an i____ school for kida all over the wold This is the school.I studied in this school five years ago.改成定语从句.还有定语从句该怎么改,有没有什么法则? is this school 与 is this the school有何区别 A：this is our school.B：wow.where is the（ Is( )some German friends visited last wssk?A.this school B.this the school C.this school one为什么? This is the school which I taught last year.请问which前可以加介词at吗?This is the school in which I taught last year.其中in可以用at代替吗？ this is the school —— I studied three years ago.横线上用where还是that? this is my school