选句填空，将其序号填在横线上。
A: This is my family photo?
B: 1. _______________________________
A: Nine.
B: 2. _______________________________
A: He’s my father.
B: What’s your father?
A: 3. _______________________________
B: 4. _______________________________
A: Yes, she is. She is a teacher.
B: 5. _______________________________
A: They are my grandpa and grandma.
B: They look young.