1.this is the book -------- i wrote last year 为什么不填WHICH,而要用

1.this is the book -------- i wrote last year 为什么不填WHICH,而要用 this is the house in which we lived last year.这里为什么用which啊?答 This is the only book ________I bought last year. A.which B. This is the room where we lived last year.这里为什么不能用关系代词that而用 为什么 this is the place which I have ever visited 的关联词要用which而 this is the book _____which I wrote down many note . Is this book __ yo bought yesterday 为什么要用the one?而不用which和th This is the room in ___ I lived last year.A.Which B.That C.W This is the hotel which I lived in last year 的同义句 This is the book --- I got from Sally last week.A which B wh This is the house in which we lived last year This is the school which I taught last year.请问which前可以加介词at吗