选择适当的词填空, 把对话补充完整。
Ben: Hello, Tom. How are you?
Tom: Fine. Look, this is a picture of my family.
Ben: (What's, Who's) that man, Tom?Is(he, she) your brother?
Tom: No, he(is, isn't). He is(my, your) father.
Ben: Your father?He is so young.
Tom: Thank you. And that lady is my(friend, mother).