This is the book _____we are looking for,为什么填which,

This is the book _____we are looking for,为什么填which, Is this the book for which you are looking 改错 This is the book which you are looking for.which 怎么在从句中作look 看看这句话对不对 Is this the book which you are looking for? 定语从句 This is the book that you are looking for the book.为什么后 Is this book _______ you are looking for?为什么不能用that而用the one This is the book which I am looking for 中 which可不可以省略?还有whic This is the book for which he is looking 这句话正确吗? This is the very house ___(that/which)we are looking for. This is the watch for which Tom is looking这个句子有错吗,为什么, This is the ring for which she is looking. This is the watch for which Tom is looking.