this is a book 提问This is a book .a book提问____ ____ this That is a quilt .a quilt 提问____ ____ that

问题描述:

this is a book 提问
This is a book .a book提问
____ ____ this
That is a quilt .a quilt 提问
____ ____ that

两个答案一样,都是:what is