英语四级阅读理解训练集(40篇)!
c.tired
d.inneedofcomfort
3.Edithstoppedatthenextcounter_________.
a.purosely
b.suddenly
c.unwillingly
d.accidentally
4.Edith'sfathersmokedapipe_______.
a.whenhewasobliged
b.onsocialoccasions
c.fromtimetotime
d.whenhewasdelighted
5.Shoppingwasverydisagreeableatthattimeoftheyearbecause_______.
a.coustomerstrodoneachother'stoes
b.coustomerspokedeachotherwiththeirelbows
c.customersknockedeachother
d.customersweredoingtheirshoppinginagreathurry
答案：dbdcd
大学英语四级阅读理解试题40篇之十（含答案）
Ifthepopulationoftheearthgoesonincreasingatitspresentrate,therewilleventuallynotbeenoughresourceslefttosustainlifeontheplanet.Bythemiddleofthe21stcentury,ifpresenttrendscontinue,wewillhaveusedupalltheoilthatdrivesourcars,forexample.Evenifscientistsdevelopnewwaysoffeedingthehumanrace,thecrowdedconditionsonearthwillmakeitnecessaryforlustolookforopenspacesomewhereelse.Butnoneoftheotherplanetsinoursolarsystemarecapableofsupportinglifeatpresent.Onepossiblesolutiontotheproblem,however,hasrecentlybeensuggestedbyAmericanscientist,ProfessorCarlSagan.
Saganbelievesthatbeforetheearth'sresourcesarecompleetelyexhausteditwillbepossibletochangetheatmophereofVenusandsocreateanewworldalmostaslargeasearthitself.ThedifficultisthatVenusismuchhotterthantheearthandthereisonlyatinyamountofwaterthere.
Saganproposesthatalgaeorganismsthatcanliveinextremelyhotorcoldatmospheresandatthesametimeproduceoxygen,shouldbebredinconditionsimilartothoseonVenus.Assoonasthishasbeendone,thealgaewillbeplacedinsmallrockets.SpaceshipwillthenflytoVenusandfiretherocketsintotheatmosphere.Inafairlyshorttime,thealgewillbreakdownthecarbondioxideintooxygenandcarbon.
Whenthealgaehavedonetheriwork,theatmospherewillbecomecooler,butbeformancansetfootonVenusitwillbeneccessaryfortheoxygentoproducerain.ThesurfaceoftheplanetwillstillbetoohotformantolandonitbuttherainwilleventuallyfallandinafewyearssomethinglikeearthwillbereproducedonVenus.
1.Intelongrun,themostinsolubleproblemcausedbypopulationgrowthonearthwillprobablybethelackof______.a.food
b.oil
c.space
d.resources
2.CarlSaganbelievesthatVenusmightbecolonizedfromearthbecause_____
a.itmightbepossibletochangeitsatmosphere
b.itsatmosphereisthesameastheearth's
c.thereisagoodsupplyofwateronVenus
d.thedaysonVenusarelongenough
3.OnVenusthereisalotof________.
a.water
