大学英语四级阅读理解试题(内含答案)(8)

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

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