為了提高英語口語表達能力，假定你們班明天下午將召開依次以“Keep Our School Clean”為主題的班會，請根據以下要點用英語寫一篇簡短的發言稿。

　　1.在公共場所，不要隨地吐痰，不亂扔垃圾。

　　2.不在牆上亂塗亂畫。

　　3.堅持每天認真打掃室內外。　 注意：1.詞數在80詞左右。

　　2.請不要逐句翻譯。

　　3.發言稿的開頭和結尾已為你寫好。

　　 　

　　Good afternoon,everyone.

　　We should keep our school clean.It”s our duty .We shouldn”t throw litter about and spit in public place.We shouldn”t draw on the walls.We should sweep the floor every day.We should water floors every day.We mustn”t walk　 on the lawn.We mustn”t climb trees.We should do our best to keep our school clean.That is all.Thank you.　

作者：遼寧省黑山縣第一