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　　Nick Scott is a school teacher. His wife is a doctor. They have three children. Paul is 25. Allen is 15. He is a student. His sister is Dora. She is 11. She is in Grade One. She has a dog. The dog's name is Computer!

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W：What's this?

M：It's a football.

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W：What's that?

M：It's a cat.

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W：Look! What are these?

M：They're birds.

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W：Are these books?

M：Yes, they are.

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W：Are these watches?

M：No, they aren't. They are clocks.

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W：Is this a bus?

M：No, it's a car.