这个句子怎么理解,用了什么结构,This is the book which i am looking for

这个句子怎么理解,用了什么结构,This is the book which i am looking for This is the book which I am looking for 中 which可不可以省略?还有whic This is the watch for which I am looking 这句错吗 This is the book which you are looking for.which 怎么在从句中作look 选择：It is the book ( )I am looking for.A.which B.that C.whom Is this the book for which you are looking 改错 this is the very book that i am looking for中that 可以省略吗 This is the book( ) I am looking for.A.it B./ C.what This is the book _____ I am looking for.A.what B.that C.who 先行词包括前面的冠词吗,譬如说This is the book which I am looking for.先行词是t This is the watch for which I am looking .此句错吗 This is the watch for which I am looking 到底错没错啊 .