That‘a 什么art book

that a book in English什么意思 l'm reading a book ——art That is a book,And什么?bookis blue. farmers open a book store like that of others.这里的that做什么? That' a book in English.怎么对a book提问 That book is a story book .That book has a red cover .(合并） T That book is a story-book. That book has a red cover.（合并一句） What is in your bag?There is ( ) art book.A.a B an C the Thou art that last friday i wanted to( ) a book about art(买） Your book a------on that desk. Is that a old book改错