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____
