Maryhassomefriends. 1 Betty,Peter,Alice2 Mike.Maryisthe...
问题详情：Maryhassomefriends. 1 Betty,Peter,Alice2 Mike.Maryistheoldest3.Bettyisthirteenyears 4.SheisyoungerthanMaryandolderthanPeter.AliceisniceandMikeisseven.BettyandPeterare 5 runners.ButPeterr...