作为一名中学生,你认为课堂上哪些行为言行才是有礼貌的?哪些是不是礼貌的?用英语写出一篇作文

As a middle school student,there is no doubt that we must speak in our class.(here sort 100 words)
As far as l am concerned we should talk with our teacher with a polite and enthusiastic attitude.only in this way can we improve our study.