5BM3U1Period4[21页]

Hey,you!Lookatthesign!Youmustn’twalkonthegrasshere.Hey,you!Lookatthesign!Youshouldn’tthrowyourrubbishhere.Hey,you!Lookatthesign!Youmustbequiethere.Hey,you!Lookatthesign!Youcaneatnicefoodhere.---Whatdoesthissignsay?---Whatdoesthissignsay?---Itsays---Itsays---Whatdoesthissignmean?---Whatdoesthissignmean?---Itmeanswecan’t/mustn’t/shouldn’t---Itmeanswecan’t/mustn’t/shouldn’tReadastory:Thepa...