_______ is a picture of my family.

This is ________.

[　　]

A: Look, it is a picture of my family.
B: Oh, it is a nice picture, Tom. Who is this man?
A: It’s my father.
B: Is the girl your sister?
A: Yes, she is.
B: How old is she?
A: She’s ten.
B: Are you in the same school?
A: No, we are not.
B: Is the woman your mother?
A: Yes, she’s a teacher.
B: She looks young(年轻的).
A: I look like her.
B: Who’s that?
A: Who? The baby(婴儿)?
B: Yes.
A: Guess(猜).
B: Is it your brother?
A: No.
B:I know(知道) it’s you.
A: That’s right. I look lovely(可爱的).
(     )71.What photo is it?
A.A photo of a boy.
B.A photo of a family.
C.A photo of a room..
D.A photo of people.
【小题1】How old is the sister?