1. 补全对话

A．What's that? B．What are these? C．Thank you. D．Are these cows? E．Nice to meet you, too. F．Is it lovely?

A: Welcome to my farm. Nice to meet you.

B:  

A: It's a chicken.

B: Yes, it is. 

A: They're horses.

B: 

A: No. They're pigs.