Unit 4,Dont eat in class,Section A Period 1 (1a-2d,Do you know the meanings of the following signs,No talking,No visitors,Nofire,No mobile phones,Dont sit on the handrail,No eating. No drinking,Emergency Exit,Wet Floor,Nothing can be accomplished without norms or standards. 无规矩不成方圆,We always say,Do you know the places that have rules? And what rules do you know,school rules,class rules,family rules,library rules,dining rules,校规,班规,图书馆规则,就餐规则,家规,keep rules,break rules,遵守规则,违反规则,Living in the soci
