Is it your book? it's your . 回答这句话对吗

网友回答

回答的应该是：it's yours.
======以下答案可供参考======
供参考答案1:
应该回答Yes,it's mine
供参考答案2:
Is it your book?这句对。
it's your 不对，应该是 It's yours .
供参考答案3:
不对，It's yours.才对。要用宾格。