Do not smoke,Do not talk,Do not use a mobile phone,Do not pick flowers,Do not fish,Do not spit,Guessing Game 猜谜,Its a place (地方,You shouldnt talk and be quiet in this place,You can find many books in this place,You can borrow the books but you should have got a card,Where is it,library,Unit 4 Dont talk here,Dont talk in the library,talk,library,Dont talk in class,class,talk,Dont eat in class,eat,Dont throw waste paper on the floor,throw waste paper,Dont draw on the wall,draw,wall,Dont play footb