(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.

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