乱扔throw away Don't throw away the rubbish不乱扔垃圾 随地anywhere Don't spit anywhere不随地吐痰 It's comfortable for us to have a clean and tidy place to live in and study.So there are some school rules which we must follow.For example,we can't throw away the rubbish or spit anywhere.Do you agree with me ?And what are other school rules?