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

题目详情
this is a book 提问
This is a book .a book提问
____ ____ this
That is a quilt .a quilt 提问
____ ____ that
▼优质解答
答案和解析
两个答案一样,都是:what is