(Tom is at Carol's farm.)
Carol：Look, Tom! I have a nice farm.
Tom：Wow! It's so big. What are these?
Carol：They are horses. They are tall and strong.
Tom：Great! I can see ten horses. Are these cows?
Carol：Yes, they are. They're big and fat.
Tom：What about those? Are they ducks?
Carol：No, they aren't. They are hens. I have forty hens.
