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　　不可以找借口(excuse)不做家庭作业(homework)。如果缺席了(absent)，就应该给老师或听课的同学打电话，问作业。查明(find out)缺课时的作业是你的责任(duty)，老师没有责任要提醒你作业。

　　考试那天你不能缺席，患重病是唯一可以缺考的理由。

　　要准时(on time)!迟到被认为是不礼貌的。而且，这也会打扰其他同学。如果你不得不迟到，一定要安静地(quietly)进教室(enter the classroom)，在美国，进入教室前不必敲门。如果你经常迟到，多数老师会给你低分(a low grade)。?

　　三十七. American Classroom Rules (2)

　　Have your textbook out and be ready to begin when the class starts. Be sure you have a paper and a pencil ready.

　　In America, you should call your teacher by his or her last name, not“teacher”. Also you should use Mr., Miss, Ms. or Mrs. before the last name (such as Mrs. Smith or Mr. Jones). This is considered polite.

　　Be polite to other students. If another student is answering a question or giving areport, you should listen quietly and give them your attention.

　　It is considered impolite in the U.S. to eat, drink or chew gum(嚼口香糖) during class.Also, taking off one's shoes in the classroom is not polite.

　　If you must leave during class, do so quietly. There is no need to tell the teacher.

　　However, leaving the class for something instead of an emergency (紧急情况) is not accepted.

　　Copying another student's test or paper is never accepted. It is called cheating.

　　At most schools in the U. S , students who cheat will be dismissed.

　　【汉语翻译】

　　美国课堂行为守则(2)

　　课前要拿出课本(textbook)为开始上课做好准备(be ready)，你一定要准备好纸张和铅笔(pencil)。

　　在美国，你应该用姓氏称呼老师，而不是直接称呼“老师”。你要在姓前使用先生、小姐、女士或夫人（如史密斯夫人或琼斯先生）。这样做是有礼貌的。

　　对其他学生要有礼貌。如果其他学生在回答问题或做报告(report)，你应该安静地听，把注意力集中到他们身上。

　　在美国，在上课期间(during class)吃东西、喝饮料或嚼口香糖是不礼貌的。在教室脱鞋(take off )也是不礼貌的。

　　如果上课时你必须要离开，一定要安静。没有必要告诉老师，然而，因非紧急事件离开教室是不能接受(accept)的。

　　决不允许抄袭(copy)其他学生的试卷或论文，这被称为“作弊(cheating)”，在大部分美国学校，作弊的学生会被开除。?

　　三十八. Protecting Your Teeth

　　George Washington had many great successes in his life, but he didn't succeed in keeping his own teeth! Back then, many people lost their teeth. But modern people know how to protect their teeth.