Onedaythestaffmembersofazoocalledameetingtodiscusstheproblem--howtodealwiththekangaroosthatwerefoundoutofthecage.Theycametotheconclusionthatthecagewasplacedtoolowanddecidedtoraiseitfromonetotwometershigh.Butthenextdaythekangarooswerestilloutsideandtheyagainraisedthecagetothreemeters.

　　Quitebeyondtheirexpectation,thenextmorningtheysawthekangaroosstillfreetogoout.Theywerealarmedanddeterminedtogotoallthelengthbyraisingthecagetotheheightoftenmeters.

　　Lateragiraffe,whilechattingwithsomekangaroos,askedthem,“Doyouthinktheywillgoonraisingyourcage?”

　　“Hardtosay,”saidakangaroo,“iftheycontinueforgettingtofastenthecagedoor.”