书面表达，英语

你是一名育才小学的中学生。有一名3连及的学弟不慎丢失了一个黑色的双肩背包，里面有一串钥匙，一个红色铅笔盒，一本英语书，三张家庭照片。学弟的名字叫李明，英文名是Rich,他的班级是5班，家庭联系电话是521-4753。请你帮他写一则寻物启事，字数不限。

初一的内容吧

i'm a YUCAI middle school school.a boy lost a black backpack.there is a set of key,a red pencil case,an English book and three family photos in it.His name is Li Ming or Rich.he studies in Class 5.if you see his backpack. you can call him at 521-4753.