上周， 你们班召开了“校园节约从我做起” 的主题班会。大家讨论了校园常见的浪费现象：洗手后不关水龙头；离开教室时不关灯；用笔记本打草稿—— 等浪费纸张和学习用品；饭后乱扔饭菜。请你针对这四种现象以班级名义写出一份倡议书。
要求：
1.词数：80左右。提示：水龙头，water tap
2.倡议书的开头和结尾已给出，不计入中词数。
3.文中不得出现真实的校名和姓名。
Dear teachers and schoolmates,
We are sorry to see so much waste in our school!
                                                                                  
                                                                                  
                                                                                  
Class 1 Grade 9