智力小测试：(每小题1分，共5分)
回答下列问题。
Which is the longest word in English?
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Why is a river rich?
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Look at the numbers below. What’s the number after 48?
9, 12, 21, 48……
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Tom, Steve, and Emily each have a pet. One has a cat, another has a dog, and the third has a bird. The cat isn’t Steve’s. Tom does not own（拥有） a cat. The person who has a bird is not Steve. Who owns the bird?
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Who is closer to you , your mother or your father?
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