Bill,withhisfather,wenttoseehisgrandfater.InthetrainBil...
問題詳情：Bill,withhisfather,wenttoseehisgrandfater.InthetrainBilloftenputhisheadoutofthewindow.Hisfathersaid,"Don'tdothat.Bill!It'sdangerous."ButBillwentonputtinghisheadoutofthewindow.Sohisfatherto...