Therearemanysignsandrulesaroundus.Rulesandsignsarebecomingcommontoeverybody.Athome,therearelotsoffamilyrulesandschoolrulesatschool.

　　Itiseasyforustofindthe"nosomoking"signsontheundergroundandintheatres.

　　Moreover,therearesignsstandfordifferentdirectionsontheroadanddistinctbansforeverycircumstance.

　　Forexample,theremaybea"throwin"signbesidearubbishbin,anda"dangerous"signonthesideofadeepswimmingpool.

　　Signsaroundusareimportantbecausetheytelluswhatweshouldorshouldn'tdoatthemoment.

　　Everycitizenisobligedtoobeysignsaroundus.