阅读对话，选择正确的答案

Sam: Look at the horses, Mr. Wang!

Mr. Wang: Are they small, Sam?

Sam: No, they aren't. They are big. What's that?

Mr. Wang: It's a hen. Is it thin?

Sam: No, it's fat.

Mr. Wang: Do you like cows?

Sam: Yes, I do. What's your favourite animal?

Mr. Wang: Sheep. I think they're very cute.