补全对话。（用所给出的句子把对话补充完整，把编号填在横线上。）

A：Oh, this farm is so big.            
B： They're lambs.
A：                     
B：There are nine.
A：                           
B：No,they aren’t. They’re cows. They’re fat.
A：                       
B：They’re white and black.
A：Look, are those hens?
B：