初中英语完形填空题(2010年黑龙江省大庆市中考英语试题的一道题)
Mostpeopleliketotravelonlandbecauseit'salwayssafe.16therearestillsomepeoplewhowanttotravelindangerousplaces.OneoftheseplacesistheArcticOcean(北冰洋).
Mendonot17theArctic:Oceanveryoften.Itis18clanger.Itisdarkandcoldthereinwinter...Theiceisdangerous,19.Especiallyinsummertheicebreaksandmoves20.
InFebruary,JohnWilliamstartedtocrosstheArcticOcean.Hewentwiththreemenandseveraldogs.Thedogspulledthesledge(雪橇)overtheice,andonthesledgetherewasfoodandsome21thingsforthem.Theytraveledslowly22months.
Inthesummertheicebroke,sothey23stopandwaitforthecolddaystocome.Thenwhentheicewashard,theystartedthejourneyagain.Theystayedonabigpieceofice.Theicemovedinwindandtookthemtothe24.Duringtheirjourney,a25droppedsomefoodforthem.OnApril6,theyreachedtheNorthPole(北极).Thentheytraveledtothesouth.TheycamebackandreachedthelandonMay29.
25.A.shipB.planeC.trainD.sledge
我想问25为什么选B不选D?从哪句话看出来要选B?