unit 8,Have a good habit,litter on the floor ! 乱丢垃圾,Dont,speak with mouth full ！ 含着满嘴食物说话,Dont,talk loudly in class ! 上课大声喧哗,Dont,make a noise ！ 制造噪音,Dont,keep quite ！ 保持安静,Please,wait in line ! 排队等候,Please,bad habits good habits,1,2,Su Nan: Dont litter on the floor. Its a bad habit. Girl: Im sorry,Mom: You shouldnt tell lies. Its a bad habit. Boy: Im sorry.I wont,tell lies 撒谎,Li Shan: We shouldnt make a noise in the library. Wed better keep quite and we should have a good habit. Girl：All right,
