假设你是李杰，正通过 e-mail 和美国友好姐妹校的朋友 Tom 交流校纪班规，请你用英语向他介绍下面的“班级公约”。

要求：
1、内容完整，书写清楚，
表达通顺，书写规范；
2、请勿逐字翻译，词数90左右，
不包含已给出的句子的词数。
参考词汇：school uniform;
be active in thinking
Dear Tom,
I’d like to introduce my class rules made by us all. First, we should …
                                                                                    
                                                                                    
                                                                                    
It’s our duty to follow all the rules above. What about yours? Please write soon.
Yours,
Li Jie