2、)A:Verygood!3.(5分)读一读,选择适当的词填空。are three rules left right green red yellowYoumustknowthetraffic________ifyouwalkinacity.Thetrafficlightsarethesame第6页共6页ineverycity.There________always________lights.Youcancrossthestreetatthe________lightandyoumuststopandwaitatthe________light.The______