Asastudent,it'sourdutytokeepourschoolclean,ononehand,weshouldnotspitinapubllicplace,ontheotherhand,wecan'tdrawonthewall.what'smore,wemustnotthrowrubbishontotheground,butitisnotenoughforustodothis,weneedtomakearuleaboutkeepingourschoolclean,ifsomeonedoesn'tobeyit,heorshewillbepunished.inmyoppion,allofusdosomecleaning,dosomeuseful,Iamsurethatourschoolwillbecleaneveryday.