What are those?________(those)are books.

What are those?________(those)are books. what are those they are ________. Those books are for______________. Are those books (your) Those books are for Are those ______ books ”What are thes? Those are books.”有没有错? What are those?___They are books.(改为单数句） what are those ? what什么are those What are those?答语 what are those