七选五专练(二).doc

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1、七选五专练（二）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。AAyoungladywasstandingonthecornerwithamapinherhand.Shelookedpuzzled.   1   Iwonderedwhy.Maybeitwasbecauseofthewayshewasdressed.Sheworeadirtydressandlookedpale.AsIcrossedthestreetandcameclosertoherIaskedifshewantedhelp.   2   Asitturnedouts

2、hewaslookingforthehospital.Ifeltwonderfuljustreachingout,andtakingthatextramomenttohelp.ManytimesinthesesituationsIendupwalkingapersontowhereheorsheisgoingwhengivingdirectionswouldbetoocomplicated.   3   Manyyearsago,wetravelledinJapanandneededdirections.AkindJapanesewhosawourproblemcame

3、tousandhelpedusout.Thismanjusttookmyheavybagsandguidedustowhereweneededtobe.WecouldnotspeakanyJapanesewhilethemancouldnotspeakanyEnglish.   4 SometimeswhenIdoaspecialfavorforastranger,thepersonwillsay,“IhopeIcandosomethingforyouonedaytoreturnthefavor.”  5  ButIhopethatwhentheycomeacrossa

4、situationwheresomeoneneedstheirhelp,theywillbewillingtoreachoutaswell.A.Althoughwecouldnotcommunicatethroughwords,wecommunicatedthroughtheheart.B.Theyalreadyhavedonesomethingformebygivingmetheopportunitytohelpthem.C.Ilikehelpingpeoplethiswayduetomyownexperience.D.Severalpeoplepassedby,lo

5、okedatherbutdidnotstop.E.Itisnevertoolatetodoothersafavor.F.Thesewordsmademefeelquitewarm.G.Shethankedmeandsmiledinrelief.BLivestock(牲畜)cloningisthepracticeofcloningsheep,cattleandotherlivestockspeciesasawaytoimproveefficiency.Thebasicideabehindlivestockcloningistocloneanimalsthathavecer

6、tainqualities,suchascowsthatproducemoremilkormeat.    1 However,thispracticeisverycontroversial,andlivestockfarmershavebeenhesitanttoadoptitfullybecauseofpublicoppositionandcertaininefficiencies.Intechnicalterms,livestockareclonedbytakingcellsfromoneanimalandusingthemtofertilizeeggs(使卵子受

7、精).Scientiststakethefertilizedeggsandputtheminfemaleanimals.   2   Manyanimalsarebornwithabnormalshapes.Scientistsarelookingforwaystoimprovetheprocessandmakeitlessexpensivetoadoptonawiderscale. 3   Forexample,iffarmerswereabletotakeonlytheirverybestanimalsandrecreatethemm