选出恰当的句子，补全对话。

A. Are these carrots?          

B.  Who is this man?

C. Thirty-five.                

D. He's a farmer.

E.  Is this a dog?

A: Look at the picture of my family

B: 1____

A: He's my uncle

B:  What's your uncle?

A:  2____ Look! It's his farm

B: Wow! It's so big! 3____

A: Yes, they are

B: 4____

A: No, it isn't. It's a mother pig

B: How many pigs are there in his farm ?

A: 5____