[单选题]

C．

Therehavebeenmanygreatinventionsorthingsthatchangedthewaywelive.Thefirstgreatinventionwastheone

thatisstillveryimportanttoday——thewheel.Thismadeiteasiertocarryheavythingsandtotravellongdistance.

F．orhundredsofyearsafterthattherewerefewinventionsthatasmucheffectasthewheel.Thenintheearly1800

stheworldstartedtochange.Therewaslittleunknownlandleftintheworld.Peopledidn’thavetoexploremuchanymore.Theybegantoworkinsteadtomakelifebetter.

Inthesecondhalfofthe19thcenturymanygreatinventionsweremade.Amongthemwerethecamera,thelight

andtheradio.Theseallplayabigpartinourdailylifetoday.

Thefirstpartofthe20thcenturysawmoregreatinventions.Thehelicopterin1909,movieswithsoundin1926,the

computerin1928,jetplanesin1930.Thiswasalsoatimewhenanewmaterialwasfirstmade.Nyloncameoutin

1935.Itchangedthekindofclothespeoplewore.

Themiddlepartofthe20thcenturybroughtnewwaystohelppeoplegetoverdiseases.Theyworkedverywell.They

madepeoplehealthierandallowedthemtolivelonger.Bythe1960smostpeoplecouldexpecttolivetobeatleast60.

B．ythistimemostpeopleindevelopedcountrieshadaverygoodlife.Ofcoursenewinventionscontinuedtobemade.

B．utmannowhadadesire(渴望)toexploreagain.Theearthwasknowntomanbutthestarswerenot.Manbeganlookingforwaystogointospace.

Russiamadethefirststep.ThenUnitedStatestookastep.Sincethenothercountries,includingChinaandJapan,

havemadetheirownstepsintospace.

In1969mantookhisbiggeststepawayfromearth.Americansfirstwalkedonthemoon.Thisiscertainlyjustabegin

ning,though.Newinventionswillsomedayallowustodothingswehaveneveryetdreamedof.

61.Thispassagetalksmainlyabout.

A．whycarswereveryimportant

B．whenlightwasinvented

C．howinventionsaffectpeople’sdailylife

D．whichcountrymadethefirststepintospace

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