阅读理解
Somescientiststhinkthatonedayanimalsmaybetrainedtodoanumberofsimplejobsthatarenowdonebyhumanbeings.Theypointedoutthatatacircus(马戏团)forexamplewemayseeelephantsmonkeysdogsandotheranimalsdoingquiteskillfulthings.Ifyouwatchcloselyyoumaynoticethatthetraineralwaysgivestheanimalsalump(块)ofsugarorapieceoffruitasareward(报酬).
InRussiaforexamplepigeonswhicharebirdswithgoodeyesightarebeingusedtowatchoutforfaultsinsmallsteelballsthatarebeingmadeinafactory.Whenthepigeonseesaballwhichlooksdifferentfromtheotherittouchesasteelplatewithitsbeak(鸟嘴).Thisturnsonalighttowarnthepeopleinthefactory.Atthesametimeafewseedsaregiventothepigeonasareward.Ittakesthreeorfiveweekstotrainapigeontodothisandonepigeoncancheck3000to4000ballsanhour.
1.Whichofthesewordsisnearerinmeaningto“trained”inthepassage?
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A.taught
B.made
C.practiced
D.given
2.Thetrainergivesananimalapieceofsugarorfruit________.
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A.whentheanimalishungry
B.tomaketheanimaldosomething
C.aftertheanimalhavedonethetrick
D.beforetheanimalisgoingtodothetrick.
3.Pigeonsareusedtoexaminethesmallsteelballsbecause________.
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A.theyarecleverbirds
C.theyhavebeaks
B.theycanseewell
D.theycantellusthenumber
4.Thepigeontouchestheplatewithitsbeakwhen________.
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A.thelightgoeson
B.itseesafault
C.itseestheseeds
D.itwantstogetareward