It is a book.I like this book.合并为一句

问题描述:

It is a book.I like this book.合并为一句
It is a book.I like this book.
合并为It is a book____I like.
我在两个词中纠结as和that
并附上理由 thank you!

应该用that,这里的that引导一个定语从句修饰book;而as不能作为定语引导定语从句.