阅读短文，判断下列句子，与短文内容是否相符。

    Polite(有礼貌) people are nice to other people. Polite people never talk loudly in public(公共场合), such as the library, the hospital, the cinema... When they ask for something, they usually say, "Please". When they get something, they say, "Thank you". When they meet a person, they always say, "Hello" or "Nice to see you." When they leave, they usually say, "Goodbye". A polite student never comes to school late. If you are late, you should say "I am sorry" to the teacher or after class. In class you can't answer the teacher's question, you can say, "I am sorry. I don't know."