为了提高英语口语表达能力，假定你们班明天下午将召开依次以“Keep Our School Clean”为主题的`班会，请根据以下要点用英语写一篇简短的发言稿。
1.在公共场所，不要随地吐痰，不乱扔垃圾。
2.不在墙上乱涂乱画。
3.坚持每天认真打扫室内外。
注意：
1.词数在80词左右。
2.请不要逐句翻译。
3.发言稿的开头和结尾已为你写好。
Good afternoon, should keep our school s our shouldn‘t throw litter about and spit in public shouldn t draw on the should sweep the floor every should water floors every mustn t walk on the mustn t climb should do our best to keep our school is k you.
