根据课本P47 的课文回答下列问题。

1. Who wrote this letter?

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2. Who is this letter to?

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3. How old is the writer?

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4. The diary is specil, isn't it?

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师范附属小学有32个5月份出生的同学，那么至少有两名同学的生日在同一天是吗？说说你的理由。