7、smadeloudnoiseto(19) thetrainasitmovedintothestation.Theyrantogettheirseats(20) anyoneenteredthetrain.Theemptyseatswere(21) andthetrainwhistled(鸣笛声)tomove.Anoldmanwithayoungboyagedaround15hadtheirseatsjustnexttothefriends’group.Theyoungboywasso(22) tos
8、eeeverything.Hecheered,“Dad,thetrainismovingandthethingsaremovingbackward.”Hisfather(23) an