根据语境补全对话。

A: She's a doctor. B: How old is he? C: How many cousins do you have? D: He's my uncle. E: Who is this boy?

A: Look at the photo.

B: He is my cousin. He can play the piano.

A:  

B: He is six years old.

A: I have five cousins. Look! Who is he?

B:  He's tall and thin.

A: What does your uncle do?

B: He is a teacher.

A: Good. What does your aunt do?

B:

A: Oh! That's a great job.

B: Yes. She can help lots of sick people.