假如你是李华，正通过e-mail和美国的朋友Tom 交流校纪班规，请你用英语向他介绍下面的"班级公约"。
班级公约：
1.准时到校穿校服，作业认真按时交。（上交：hand in ）
2.教室整洁常打扫，离开熄灯关门窗。
3.和谐相处应有爱，互相帮助共同进步。
4.禁止教室内吃零食，禁止教室内大声喧哗。
5.不扎耳洞，不戴耳环，不抽烟。
要求：
1.给出要点要求写完。至少用上两个被动语态的句子。不要简单翻译，要做适当阐述，多利用教材词汇、句子。
2.100 词左右。开头结尾不计入总词数。
3.书写工整美观。
Dear Tom，
   I'd like to introduce my class rules made by us all.First，we should …
                                     .
Yours，
Li Hua

【考点】书信类；学校生活．

【答案】Dear Tom，
   I'd like to introduce my class rules made by us all.First，we should come to school on time in school uniforms.It's polite to greet our teachers when we meet them.We must listen carefully in class and be active in thinking.Also，we ought to do our homework carefully and hand it in on time.Second，we need clean the classroom often and always keep it clean.And we're required to turn off lights and close windows and doors before we leave.Third，being friendly is important.We're supposed to get along well and help each other to make progress together.Fourth，eating snacks and making loud noises in the classroom are prohibited.Fifth，do not pierce ears，wear earrings，and smoke.
   It's our duty to follow all the rules above.What about yours？Please write soon.
Yours，
Li Hua