閱讀理解試題復(fù)習(xí)

Mr.Hilllivedoutsidethecityandworkedinahospital.Hismedicalskillwasgoodandhe

gotalotofmoney.Hiswifedidn'tbelievehimandmadehimgiveallhispaytoher.Sheoften

searchedallhispocketsandfoundoutifheleftsomeforhimself.Hewasangrywithherbutdared

notsayanything.Soheboughtasafeandputallothermoneyinit.OfcourseMrs.Hilldidn't

knowaboutit.

OneSundaymorningMr.andMrs.Hilldecidedtogotoseetheirfriend.Suddenlysomething

waswrongwithhiscaranditstoppedatthecrossingoftheroadandtherailwaywhiletheywere

passingthere.Justthenatrainwasquicklycoming.Mrs.Hillwasveryafraidandopenedthedoor

andjumpedoff.Shetoldhimtojumpoffatoncetoo.

“Iboughtitforeightthousanddollarslastmonth!"shoutedtheman.MHowcanIleaveiton

thecrossing?Ifyoukeepquiet,Filsoonstartit!"Thetrainwascomingnearerandnearer.Mrs.

Hilldidherbesttopullherhusbandoutofthecar,buthepushedheraway.Thecarwasgoingto

behit,themanshouted,"Thekeytothesafeisinmystudy,undertheJapanese-Englishdictionary

ontheshelf.IfI'mdead,youcanfinditthere!"Inthetimeofdangerthetrainbrakedandhiscar

wasn'thit.ButMr.Hillwasn'thappy."Oh,dear!"hesaidtohimself.'*1havetolookforanother

placetoputthekey!"

Mr.Hilldarednotsayanythingbecause.

A.hewasafraidofhiswife

B.hiswifedidright

C.hewasafraidhiswifewouldleavehim

D.hewasafraidhiswifewouldtellthehospitalaboutit

Thewomanjumpedoffthecarbecause.

A.itwentveryslowly

B.shewantedtorestbytheroad

C.shewantedtogothereonfoot

D.shewasafraidtobehit

Mr.Hillwouldn'tleavehiscaronthecrossingbecause.

A.hewasn'tafraidofdeath

B.itcosteightthousanddollars

C.hewassuresomeonewouldhelphim

D.hewasafraiditwouldstopthetrain

Whenthetrainwasrushingtowardshim,Mr.Hillwished.

A.itcouldstopatonce

B.tobesaved

C.hiswifetogetthemoneyinthesafe

D.hiswifetorememberhimforever

As,Mr.Hillfeltsorry.

A.thetraindidn'thithimtodeath

B.hehadn'tstartedhiscarbeforethetrainstopped

C.hiswifelefthiminthetimeofdanger

D.hehadtoldhiswifeaboutthesecret

WhenwewritealetterinChinese,wealwaysputthedateattheendoftheletter.Butitis

differentinEnglish.Wehavetoputitonthetopoftherightcorner.Andabovethedate,wealso

writethenumberofourhouseandthenamesofourstreet,cityandcountry.Tobegintheletter,we

alwaysusethewordslike"dear,sir'1,"dearMr/Miss/Mrs..."Totheendoftheletter,weusually

usewordslike"yours1',"yoursever"or"Trulyyours'1.

ItisalsodifferenttowriteanEnglishenvelope.IfyouwritetoanAustralianfriendnamedJane

Shute,writeyournameandaddressonthetopoftheleftcornerandwritehersinthemiddle.

Nowreadthefollowingenvelope,please.

QinLing

No.11MiddleSchool

Zibo,Shandong,P.R.C.

MissJaneShute

65

KingStreet,NewTown

Sydney,Australia

Theword"it"in"Wehavetoputitonthetopof..."means

A.thedateB.theletterC.theenvelopeD.

thepassage

Fromthepassage,weknowweshouldputdownouraddresswhenwe

writealetterinEnglish.

A.attheendoftheletterontheleft

B.attheendoftheletterontheright

C.atthetopoftheletterontheleft

D.atthetopoftheletterontheright

HowdoyoubeginyourletterifyouwritetoPeterWhite?

A.White.B.MrPeter.

C.DearMrWhite.D.DearSirPeter.

Readtheaboveenvelopeandtellwhatcountrywilltheletterbesentto?

A.P.R.C.B.America.C.Australia.

D.Sydney.

Readtheaboveenvelopeandtellwhowritesthisletter?

A.Zibo.B.QinLing.C.MissShute.

D.MissJane.

Itseemstobestrangetomostofyouthatthereisablindspotonyoureyes.

Hereisaninterestingexperimentthatcanmakesomethingdisappear,whenoneeyeisopen.

MakeacardaboutthesizeofapostcardandwritetwoEnglishlettersLandRonit,Lontheleft

andRontheright.First,holdthecardabout80cmawayandyouseeboththeletters.Thenclose

yourrighteyeandlookattheletterRonlywithyourlefteye.Andnow,asyoumovethecard

slowlytowardsyou,you'llfindtheletterLdisappearing.Butifyoumovethecardnearertoyour

face,theletterwillbeseenagain.Nowdothesameexperimentwithyourlefteyeclosed;you'll

findtheletterRdisappearing.

Whydoestheletterdisappear?Itisbecausethereisablindspotontheeyes.Whentheimageof

theletterfallsontheblindspot,itwon'tbeseen.Thatiswhyeitherofthelettersdisappears.

Thewriterofthepassagethinksthatthereisablindspotontheeyes.

A.fewpeopleknowB.nooneknows

C.mostpeopleknowD.allthepeopleknow

Theword"disappear“inthepassagemeansinChinese.

A.驅(qū)散B.消散C.消失D.

遺失

YoufailtoseetheletterLintheexperimentbecause

A.youreyesarepoor

B.itsimagefallsontheblindspot

C.youmoveitclosetoyoureye

D.yourlefteyeisnotopen

Inwhichordershouldyoudotheexperiment?

1.Holdthecard.2.Movethecardnearer.

3.Closeyourrighteye.4.WritetwoEnglishletters.

5.LookattheletterR.6.Makeacard.

A.4-6-1-2-3-5B.1-3-6-4-5-2

C.6-1-4-3-2-5D.6-4-1-3-5-2

Thepassagemainlytellsus.

A.howtofindtheblindspotB.aninterestingexperiment

C.wheretheblindspotisD.thereisablindspotontheeyes

Howeworkedinamuseum.Hestudiedtheoldthingsandsometimesboughtsomefor

himself.Andhegotalotofmoney.Eightyearsago,whenhewassixty-five,heretired.Heneedn't

worryaboutfoodorclothes.Hehashisownhouse,carandservants.Hewasbusybefore,butnow

hehasenoughtimetorest.Helovesplayingpingpongandspendsmosttimeonthegame.Hehad

hardlybeenilluntilhehadgotaterribleheadacheoneday.Hewastakentoahospitalatonce.

Thedoctorslookedhimovercarefullyanddidtheirbesttosavehimbuthefeltworseandworse.

Hewouldn'tseethemanylongerandmadehissonsendforawitch."Dothepersonsintheheaven

playpingpong,madam?"askedMr.Howe.'TmsorryIdon'tknow,sir,"answeredthewitch."Let

megoandinquireitforyou."ThateveningthewitchcameandsaidJTvejustbeentotheheaven,

Mr.Howe.I'vebroughttwopiecesofnewstoyou.Oneisgoodandtheotherisbad.'1"Tellmethe

goodnewsfirst,please.”“Mostofthepersonsintheheavenplaypingpong,"saidthewitch."But

you'llhaveamatchtherethedayaftertomorrow!"

Mr.Howeisnow

A.fifty-sevenB.sixtyC.sixty-five

D.seventy-three

Mr.Howewasrichbecause

A.hegotalotofmoneyinthemuseum

B.hestudiedtheoldthingsbefore

C.hehashisownhouseandcar

D.heworkedhardinthemuseum

As,Mr.Howehadhardlybeenill.

A.heoftentookgoodmedicine

B.hewasalwaystakengoodcareof

C.herestedverywellallthetime

D.heoftenplayedping-pongwhenhewasfree

Mr.Howewouldn'tseethedoctoranylongerbecause.

A.hewouldn'ttakeanymedicine

B.hedidn'tthinktheycouldsavehim

C.theyweren'tpolitetohim

D.theyhopedhecouldgooutofhospital

Thebadnewsmeant

A.Mr.Howewouldsoonbewellagain

B.Mr.Howewoulddieintwodays

C.Mr.Howewouldgoonplayingpingpongintheheaven

D.hewastheonlyonetogototheheaven

AyoungAmericandoctorwassleepingwhensuddenlyhisdoorbellbegantoring.Itwas

alreadymidnight,butwhatcouldthedoctordo?Hehadtogetup,putonhiscoatandwent

downstairs.

Whenheopenedthedoor,hesawamanstandingwithahatinhishand."Howdoyoudo?

doctor/'saidtheman."Canyoucomeatoncetoaplaceoutoftown?It'squitefarbutyouhavea

carandIcanshowyoutheway."

"Certainly,1'saidthedoctor.'Tmquiteready,Icancomeatonce,"Inafewminutesthecarwas

standingatthefrontdoor,themangotonthedoctor's.Andtheydroveoff.

Theydroveonforalongtime,andthenthemansaid,nHereweare.Thisismyhome.NowIcan

payyouandyoucangobacktotown.1'

nButImustseethepatient,"thedoctorsaid."HowcanIgobackwithoutseeingthepatient?

Whereisthepatient?',

"Thereisnopatient/*answeredtheman.MNobodyisill.Ilivehere,yousee,andonemustget

homefromatown,mustn'the?Therearenotaxisatthistimeofthenight,butadoctoroften

makesnightcalls,soexcuseme.Hereisyourmoney.Thankyou,doctor,Goodnight!”

Fromthispassage,wecanguessthestoryhappened.

A.lateatnightB.earlyinthemorning

C.inthetownnotfarawayD.downstairs

Themanlivedthedoctor'shouse.

A.alongwayfromB.quitenear

C.inthetownnotfarawayD.nextto

Thedoctorandthemanleftthetown.

A.inanhourB.inacarC.onfootD.onahorse

Whatthemanwantedtodowasonly.

A.totakethedoctortohishome

B.togivethedoctormoney

C.togethomeinthedoctor'scar

D.toplayajokeonthedoctor

Adoctoroftenmakesnightcallsbecause.

A.someonewantstomakeatelephonecall

B.someonemustgethomefromatown

C.helikestohaveawalkatnight

D.someoneisillatnight

DearRose,

Ilikeyourprogrammesverymuch.PmnowwritingtoaskyousomethingaboutAmerican

socialcustoms.MyAmericanfriendswantmetojointhemintheirdinnerparty.Iamveryhappy

andhavedecidedtogobutFmalittleworriedaboutit,too.Thesocialcustomsinmycountryare

verydifferentfromhere,andIknowlittleaboutit.

ShouldIbringapresent,suchassweetsorflowers?ShouldIarriveontimeoralittlelate?At

thedinnertable,howcanIusetheforkandknife?HowcanIletthefamilyknowthatI'mthankful

fortheirkindness?

DearWangLin,

Ifsagoodideatobringasmallpresentwhenyougotoadinnerparty.Flowersarealwaysnice,

oryoumaybringabottleofwineifyouknowthatyourfriendsdrinkit.

Youshouldarriveontimeorfivetotenminuteslate.Don'tgetthereearly.Ifyou'regoingtobe

morethanfifteenminuteslate,youshouldcallandtellthem.Trytobefreeatthedinnertable.If

youdon'tknowhowtousetheforkandknife,justwatchtheotherpeople,andfollowthem.Ifyou

stillhavenoideaofwhattodo,askthepersonnexttoyou.

Ifyoulikethefood,sayso.Ofcourse,you'llthankthemforthemealandfortheirkindness.It's

alsoagoodideatosendathank-youcardthedayafter.

WangLinwantsto.

A.makefriendswithRose

B.knowsomesocialcustomsforadinnerparty

C.makeherfriendshappy

D.giveherfriendsasurprise

MaybeRose.

A.isagoodhousewifeB.worksataTVstation

C.isgoingtothedinnerpartyD.isafriendofWangLin's

IfyouYeaskedtoadinnerpartybutnotsureaboutwhattobringasapresent,it'sgood

tobring.

A.somefruitsB.abottleofwine

C.someflowersD.aknifeandafork

WhichofthefollowingisNOTproperforjoininginadinnerparty?

A.Getthere15minutesearlier.

B.Makeyourselfathome.

C.Followotherstousetheforkandknife.

D.Thankyourfriendsforthemeal.

Fromtheletterswe'velearnedthatit'sverytoknowsomethingaboutAmerican

socialcustoms.

A.difficultB.friendlyC.enjoyableD.helpful

WaltDisneybegantomakecartoonmovieswhenhewasyoung.Buthedidn'thavemuch

moneyandhedidn*talwayshaveenoughtoeat.Onedayamouserannearhisdeskwhenhe

workedinhissmalloffice.

*'Wouldyouliketobemypet?nDisneyaskedthemouse.Hecaughtthemouseandkeptitasa

pet.Afewyearslater,Disneydecidedtomakeacartoonaboutit.

"IammakingacartoonaboutamousenamedMortimer,'1hetoldhiswife.

"MortimerMouse?IthinkMickeyMousewouldbeabettername,"shesaid.

"Youareright.Itwould,"DisneyagreedandmademanyMickeyMousecartoons.

PeopleallovertheworldsawMickeyMouseandlovedit.MickeyMousemadeDisney

famous.ThencameDonaldDuck,andGoofyDogandothers.Disneybegantomakefull-length

cartoons,thenhemadecartoonmoviesfortelevision.

Millionsofchildrenwatchedtheshowseveryweek.

In1955,Disneyopenedawonderfullandofmake-believeinCalifornia.Realboats,castles,

trains,mountains,rivers,allinonebeautifulpark.MillionsofpeoplecametoDisneyland.

Hediedin1966,buttheworldwillnotforgethimquickly.MickeyMouseandallhiscartoons

willhelpustorememberhim.

WhenDisneybeganmakingcartoonmovies,.

A.heearnedalotofmoneyB.hewasverypoor

C.hewasafamouscartoonistD.helikedtokeeplittleanimalsaspets

Thispassagemainlytellsus.

A.howDisneymadecartoonmovies

B.howDisneybuiltDisneyland

C.somethingaboutDisney*schildhood

D.somethingaboutDisney'slife

WecanlearnfromthispassagethatDisneylandis.

A.aparkB.acityC.anislandD.acastle

Disneylandwasbuilt.

A.whenDisneywasyoung

B.after1986

C.assoonasMickeyMousebecamepopular

D.inthemiddleofthe1950's

Whichofthefollowingsentencesistrue?

A.Disney'swifeaskedhimtomakeacartoonaboutthemouse.

B.MickeyMousewasthenamesuggestedbyDisney'swife.

C.Disneycaughtamouseandmadeacartoonaboutitatonce.

D.Disney'swifegavehimamouseasapet.

Mobilephonehasbecomeaproblemformiddleschools.SomemiddleschoolsinAustralia

havebannedstudentsfromcaiTyingmobilephonesduringschoolhours.

Mobilephoneuseamongchildrenhasbecomeaproblemfortheschoolthisyear.Several

childrenhavegotmobilephonesasChristmasgifts,andmorestudentswillwantthem.

MaryBluest,anofficial,saidmobilephoneuseisadistractiontostudentsduringschoolhours

anditalsogivesteacherssomuchtroubleintheirclassrooms.Teacherswerealsosayingthat

sometimesstudentsmightusephonemessagestocheatduringexams.

Shesaidsomeschoolshadtriedtobanmobilephones.Someparentsfeltunhappybecause

theycouldn'tgetintouchwiththeirchildren.

Manyteacherssaidstudentsshouldnothavemobilephonesatschool,butiftherewasagood

reason,theycouldleavetheirphonesatschooloffice.Theyalsosaidthereweremanyreasons

whythestudentsshouldnothavemobilephonesatschool;theywereeasytoloseandwerea

distractionfromstudies.

Manypeoplesaythattheyunderstandwhyparentswouldwanttheirchildrentohavephones,

buttheythinkschoolsshouldletthestudentsknowwhentheycanusetheirmobilephones.

SomemiddleschoolsinAustraliahavebannedstudentsfromcarryingmobilephones.

A.becausetheyarestudentsB.whentheyarefree

C.whentheyareatschoolD.becausetheyarechildren

Weknowfromthepassagethatsomechildrengetmobilephonesfrom.

A.themakersandsellersB.thepassers-byandstrangers

C.theirparentsandfriendsD.somemobilephoneusers

Whatdoestheword“cheat“inthethirdparagraphmeaninthepassage?

A.聊天B,核對(duì)C.查詢D.作弊

Someparentsfeltunhappybecausetheycouldn'tduringschoolhours.

A.usetheirmobilephones

B.leavetheirmobilephonesatschooloffice

C.helptheteacherswiththeirwork

D.getintouchwiththeirchildren

Thepassagetellsusthat

A.studentsshouldn'thavemobilephonesatschoolexceptforsomespecialreasons

B.itisimpossibletobanstudentsfromusingmobilephonesatschool

C.someparentsfeltunhappybecausetheycouldn'tusetheirphonesatschool

D.parentsshouldteachtheirchildrenhowtousemobilephonesduringschoolhours

Amoment'sdrillingbythedentistmaymakeusnervousandupset.Manyofuscannot

standpain.Toavoidthepainofdrillingthatmaylastperhapsaminuteortwo,wedemandthe

uneedle"—ashotofnovocaine（——種麻醉藥）一thatdeadensthenervesaroundthetooth.

Nowit'struethatthehumanbodyhasdevelopeditsmillionofnervestobehighlyawareof

whatgoesonbothinsideandoutsideofit.Thishelpsusadjusttotheworld.Withoutour

nerves—andourbrain,whichisabundleofnerves—wewouldn'tknowwhat'shappening.Butwe

payforoursensitivity.Wecanfeelpainwhentheslightestthingiswrongwithanypartofour

body.Thehistoryoftortureisbasedonthehumanbodybeingopentopain.

Butthereisawaytohandlepain.LookattheIndianfakir（印度苦行僧）whositsonabed

ofnails.Fakirscanputaneedlerightthroughanarm,andfeelnopain.Thisabilitythatsome

humanshavedevelopedtohandlepainshouldgiveusideasabouthowthemindcandealwith

pain.

Thebigthinginwithstandingpainisourattitudetowardit.Ifthedentistsays,"Thiswill

hurtalittle,uithelpsustoacceptthepain.Bystayingrelaxed,andbytreatingthepainasan

interestingsensation,wecanhandlethepainwithoutfallingapart.Afterall,althoughpainisan

unpleasantsensation,itisstillasensation,andsensationarethestuffoflife.

Thepurposeofthispassageismainlytotellus.

A.thatpainisgoodforus

B.tostoptakingthe"needle"atthedentist's

C.howtohandlepain

D.howtoavoidtorture

Theresultofpainisto.

A.letusknowwhat'sgoingon

B.makeusopentotorture

C.makeuspayforoursensitivity

D.helpusgetmoresensations

Themostimportantthinginhandlingpainisto.

A.dowhattheIndainfakirsdo

B.welcomeit

C.knowaboutitinadvance

D.treatisasaninterestingsensation

Theword''withstanding'*inthelastparagraphcanbestbereplacedby.

A.having

B.handling

C.accepting

D.sensing

Thesentence"wepayforoursensitivity"(Para.2)mostprobablymeans.

A.wesufferbecauseofbeingsensitive

B.oursensitivitycostsusagreatdeal

C.wehavetopaythedentistforhismakingussensitivetopain

D.weareluckytohavedevelopedoursenses

IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorthAmerica.It

isanextremelyseriousprobleminsomedevelopingcountries.Forthesecountries,economic

growthisaveryimportantgoal.Theywanttoattractnewindustries,andsotheyputfewcontrols

onindustrieswhichcausepollution.

Cubatao,anindustrialtownof85,000peopleinBrazil,isanexampleoftheconnection

betweenindustrialdevelopmentandpollution.In1954,cubataohadnoindustry.Todayithas

morethantwentylargefactories,whichproducemanypollutants.Thepeopleofthetownare

exposedtoalargenumberofpoisonoussubstancesintheirenvironment,andtheconsequencesof

thisexposurecanbeclearlyseen.Birthdefectsareextremelycommon.Amongchildrenandadults,

lungproblemsaresometimestwelvetimesmorecommoninCubataothaninotherplace.

ItistruethatBrazil,likemanyothercountries,haslawsagainstpollution,buttheselaws

arenotenforcedstrictlyenough.Itischeaperforcompaniestoignorethelawsandpaythefines

thantobuytheexpensiveequipmentthatwillreducethepollution.Itisclear,therefore,that

economicgrowthismoreimportanttothegovernmentthantothehealthoftheworkers.However,

theresponsibilitydoesnotcompletelyliewiththeBraziliangovernment.TheexampleofCubatao

showsthatinternationalcompaniesarenotactinginaresponsiblewayeither.Anumberof

factoriesinthetownareownedbylargecompaniesfromFrance,Italy,andtheU.S.Theyare

doingthingsinBrazilthattheywouldnotbeabletodoathome.Iftheycausedthesameamount

ofpollutionathome,theywouldbeseverelypunishedorevenputoutofbusiness.

Developingcountriesdonothavestrictpollutioncontrolsbecause.

A.thenewindustriestheywanttoattractdonotcausemuchpollution.

B.pollutionisnotaseriousproblemfordevelopingcountries

C.theydon'trealizethatthebalanceofnaturewillbedisturbedbysomepollutants

D.iftheypulstrictercontrolsonindustry,fewercompanieswouldbuildnewplantsthere

Theauthor'spurposeinmentioningCubataoisto.

A.showthatindustrialdevelopmentcanproceedveryquicklyindevelopingcountries

B.showthatpollutionprobleminBrazilisextremelyserious

C.showthatindustrialgrowthcancausepollutionproblemsfordevelopingcountries

D.showthatpollutionsisthreateningthelivesofmanypeopleandthewholeeconomy

ofBrazil

HowisthehealthofthepopulationofCubatao?

A.Thereismoreheartdiseaseamongpeoplewholivenearchemicalfactories.

B.Morepeoplesufferfromlungdiseasesbecauseofpoisonoussubstances.

C.TheirhealthisaffectedbypollutantsinthesamewayasthatofotherBrazillians.

D.Babiestherearefoundnotasbrightasthosewholiveinotherplaces.

SomeforeigncompaniesliketosetuptheirplantsinBrazilbecause.

A.theinvestmentenvironmentinBrazilissuitableforthem

B.theywillnotbeseverelypunishediftheycausepollutioninBrazil

C.theycanmakeabigprofitbecausetheydonothavetopayBrazillianworkersmuch

D.theycanactinanirresponsiblewayinBrazilbecausetherearenopollutionlawsthere

Theword"enforced"(Para.3)couldbestbereplacedby.

A.carriedout

B.drawnup

C.lookedover

D.strengthened

Therehavebeenmachinetoolsforonlyabouttwohundredyears.Beforetheearlypartof

theeighteenthcenturytherewasnopowertodrivemachines.Manhadonlythestrengthofhis

body.Withtheinventionofthesteamengine,however,manhadasourceofpowertodrive

machinery,andsohebegantoinventmachines.

Thefirstaccuratemachinetoolsweremademostlyofwood.Metalwastooexpensiveto

useforanythingexceptscrewsandforthepartsofthemachineforwhichwoodwasnotsuitable.

Thesefirstmachinetoolswereusedbywatch-andclock-makersandinworkshopsmaking

scientificinstruments.

Whenacheaperwayofmakingironwasdiscovered,moremetalcouldbeusedinmachine

tools.Theuseofmetalmadeitpossibleformanynewkindsoftoolstobeinvented.

Everynewinventionordicoverymakesfurtherinventionspossible.Rocketpower,for

example,hasbeenknownforhundredsofyears.Butspacerocketscouldnotbedevelopeduntil

suitablemetalswerediscoveredforuseinspacecraft.Assoonasmandiscoveredthesemetalshe

couldbuildspacecraft.Butheneededotherinventionstoguideandcontrolhisspacecraft.Usually,

therefore,anewinventionistheresultofnewknowledge.Atthesametime,itoftenresultsin

furthernewknowledge.

Thebestpossibletitleforthispassageis.

A.Invention

B.Knowledge

C.MachineTools

D.SpaceTravel

Wehavehadmachinetoolsforsuchashorttimebecause.

A.theyareexpensive

B.twohundredyearsagotherewasnosuitablepowersupply

C.theyneedalotofwood

D.inthepast,manhadnouseforthem

Thefirstmachinetoolsweremademostlyofwoodforthereasonthat.

A.therewasnoiron

B.woodwasthemostsuitablematerial

C.woodburnseasilyandproducesitsownpowersupply

D.metalwasexpensive

Whichofthefollowingisasourceofpower?

A.Amachinetool

B.Iron

C.Aspacecraft

D.Asteamengine

Oneinventionordiscoveryoftenleadsto.

A.anewsourceofpower

B.bettermachinetools

C.furthernewinventionsordiscoveries

D.spacetravel

ThosewhoplannedandconstructedthefirstAmericanrailroadswerepeopleofgreat

vision.Theypredictedthattheir"ironhorses1'wouldopenvastexpansesoflandtofarmingand

industry.Theyknewthattownswouldspringupalongthenewrailroads.Yetfewofthesepioneers

couldhaveguessedthatAmericanrailroadswouldestablishthesystemoftimeusedthroughout

mostoftheworldtoday.

Untilthe1880s,alltimeintheUnitedStateswassuntime.Farmerssettheirclocksto

noonwhenthesunappearedtobeoverhead.Intowns,peoplesettheirclocksbyacourthouse

clockorfactorywhistles.Onetown'stimewasoftendifferentfromthetimeinaneighboringtown.

Asthenewrailroadsexpanded,largenumbersofpeoplebegantotravel.Buttherailroads

wereunabletoprintaccuratetimetableswhenmosttownsalongtheirtrackshadtheirclocksset

differently.Therewasneedforachange,andtherailroadsledinplanningit.

In1883,railroadsintheUnitedStatesandCanadaadoptedstandardtime,asystemthat

dividedthecontinentintofour