今年是西宁市创建全国文明城市的攻坚之年，我市中小学正在开展以"提升文明素养，做文明礼仪的倡导者"为主题的英语作文比赛．请写一篇80 词左右的短文（ 文中不得出现真实校名和姓名；首句已给出，不计人总词数）．要求包括以下要点：

1．说话有礼貌；

2．不横穿马路；

3．不乱扔垃圾；

4．不采摘花草；

5．不在公共场所大声喧哗．

Be A Student With Good Manners

   Nowadays we are trying our best to make Xining become a civilized city．As sudents，we must

know what we should do and what we shouldn't do． 　                              　．