补全对话。A：That white dog is so cute.
B：No，it isn't.
A：
B：It's Mrs Green's.
A：
B：No，it isn't.
A&B：
Mrs Green：Sure. Come here，dear.

A．Is it eating now? B．Is this your dog? C．It's playing a ball. D．Can we play with your dog, Mrs Green? E．Whose dog is it?