this school is which you visit last year 是表语从句么?这句话对么?

this school is which you visit last year 为什么不是表语从句? this is what makes makes you happy这句话是表语从句吗? Is this park _ we visit last year?A the one B which C where 英语题：Is this school ____ you visited last year? is this the school that you vistied last year Is this the school _____ you visited last year? Is this school that you visited last year?哪里错 1.Is this the school (D) you visited last year? is this factory___we visited last year答案是the one怎么知道他缺少表语?表语 Is this school ____we visited last year?A.which B.in which C This is the tree which the highest 这句话对么? Is this museum what you visited?为什么是表语从句?