读对话，选择恰当的句子补全对话。

A. No, it isn't. B. She's a nice teacher. C. Who's that young man? D. He's cute. E. I'm making a family album(相册).

: Hi, Sam. What are you doing?

: Hi, Daming.

: Oh, who's this boy?

: He's my little brother.

: Is this your mother?

: It's my aunt. She's a nurse.

: Is that your mother?

:Yes.

:

: He's my uncle. He is an actor(演员).

: Wow! He's cool.