Is this the school ( ) I have studied for three years?

Is this the school ( ) I have studied for three years? This is the school ______ I studied three years ago . This is the school ____I studied three years ago. This is the school ________ Jack studied for three years.A.t this is the school —— I studied three years ago.横线上用where还是t I have studied in my school for three years and I will say g This is the school.I studied in this school five years ago. this is the primary school______I studied three years ago. I (have) this watch for three years. this is the school where/in whicn i studied five years ago.可 1.Is this the school ___you studied ten years ago? this the school___I studied three years ago