A：Whose hat is this?
B：This is my hat.
A：Whose raincoat is this?
B：This is my father's raincoat.
A：Whose dress is that?
B：That is my mother's dress. Her dress is beautiful, isn't it?
A: yes, it is. Is that your skirt?
B：No, it isn't. It's my sister’s skirt. Her skirt is red and my skirt is blue.
A：Um, look at these socks. Let me guess. They must be your brother's socks.
B: You are right.