is__you borrowed from the library?为什么是this the book而不是this the book wich/that?

问题描述:

is__you borrowed from the library?为什么是this the book而不是this the book wich/that?
谢谢!定语从句小问题……

如果book后面加which或that,这个句子就只有主语和谓语,不完整的
一定要加,可以改成
Is this book the one which you borrowed from the library?