求一篇school rules作文,60词,要求使用被动语态

School rules are very important.There are many rules in our school.For example,we should wear our school uniforms at school and we should go to school on time.We should keep the classroom clean and tidy.We can't eat,drink or sleep in class.We must do our homework ,too.We aren’ t allowed to smoke.We aren’t allowed to fight in school.We aren’ t allowed to bring mobile phones to school .I think these rules are good for our study and school life.We must obey the rules.