中信英语部分专项练习六Word下载.docx

中信英语部分专项练习六Word下载.docx

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Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA）,B）,C）andD）.YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.

Passage1

Thegreatbulkofexpertopinionisthatowingagununderminesratherthanincreasessafety:

thefunctionofdiscouragingburglarsorothercriminalsismorethanoffsetbyotherfactors.Firstcomethesuicides:

in1986,18,153peopleshotthemselvestodeath.Nooneonknowshowmanymighthavelivediftheyhadbeenunabletopickupagunandhowmanymighthavemerelychosenothermeanstoendtheirlives.Butsurelythepresenceofaloadedguninabureaudrawermusthavetemptedmany,particularteens,toyieldtoablackdepressionthatmighthaveliftedhadthemeanstocarryoutthedarkwishnotbeensoreadilyavailable.

Thencometheaccidentalshootings,manybyfoolishguyswhoneverbothertolearnhowtohandletheirweapons.Moreheartbreakingarethefrequentincidentsofchildrenpickinguptheirparents’gunsandfindingoutinthemostdisastrouswaythattheyarenottoys;

forexample,aneight-year-oldboywhoshothissix-year-oldsisterdeadlastweekinFairfax.Thentherearethequarrelsbetweenspouses,betweenparentsandtheirchildren,betweenneighborsandfriendsthatsuddenlyturnfatalbecauseoneorbothcanpickupagun.Policecommonlyestimatethatifahouseholdguniseverusedatall,itissixtimesaslikelytobefiredatamemberofthefamilyorafriendasatanintruder.（Itisevenmorelikely,saysDr.CarlBell,aChicagopsychiatrist,thatthegunwillbestolen;

gunareprimetargetsforburglarsbecausetheycanbeeasilyandprofitablysoldtoothercriminals.）Andfinally,intherelativelyrareshoot-outsbetweenhouseholdersandburglarsthatdooccur,itmighteasilybetheburglarwhoprovesmoreskilledinhandlinghisgunsandthehouseholderwhowindsupinmorgue（停尸房）.

Addingalltypesofdeathstogether,MercyandHouk,researchersfromtheAtlanta-basedCentersforDiseaseControl,pointoutthat“duringthelasttwoyears,thenumberofpeoplewhodiedofinjuriesinflictedbyfirearmsintheUnitedStatesexceededthenumberofcasualtiesduringtheentire8.5-yearVietNamconflict.”MercyandHoukjudgedthat“injuryfromfirearmsisapublic-healthproblemwhosetollisunacceptable.”

AnothergroupofresearcherspresentedevidencethatlaxU.S.gunlawsmightbetoblame.Theteam,headedbyemergencyroomsurgeonJohnHenrySloan,studiedapairofcitiesjust140milesapart:

SeattleandVancouver.Thetwocitieshadsimilarunemploymentrates,householdincomes,law-enforcementpoliciesandevenfavoriteTVshows.Twodifferences:

inCanada,handgunownershipistightlyrestricted;

inWashingtonState,gunsaremoreeasilypurchased.Andbetween1980and1986Seattlehad388homicides,vs.204Vancouver.

1.Accordingtomostexperts,possessingagun________.

A）cannotguaranteeyoursafety

B）doesmorethanassureyousafety

C）leadstomoresuicides

D）canonlyfrightenthieves

2.“Tocarryoutthedarkwish”inthelastsentenceofthefirstparagraphmeans_________.

A）killingoneself

B）shootingothers

C）yieldingtodepression

D）pickingupagun

3.WhichofthefollowingstatementsisNOTtrue?

A）Manychildrenbecomethevictimsofplayingguns

B）Ahouseholdgunismorelikelytoaimatafamiliarperson

C）Accidentalshootingsoftenhappenwhenpeoplearequarrelling

D）Agunathomeisverylikelytobetakenawaybyburglars

4.Theword“lax”inthefirstsentenceofthelastparagraphmostprobablymeans________.

A）different

B）unrestricted

C）funny

D）notstrict

5.Theauthorcitesthetwocitiesasanexampletodemonstratethat________.

A）whatmattersistocarryoutthegunlaws

B）allstatesmusthavethesamegunlaws

C）gunownershipmustbestrictlyrestricted

D）gunlawshavelittleeffect

Passage2

EversinceDarwin’stheoryofevolution,biologistshaveassumedthatenvironmentsteemingwithcomplexformsoflifeservedasthenurseriesofevolution.ButtworecentpapersinSciencemagazinehaveturnedthatnotiononitshead.Lastmonthsomebiologistsreportedthatintheoceanitistherelativelybarrenareasthatserveas“evolutionarycrucibles（熔炉）,”notregionswithgreatdiversityofspecies.OtherresearchersannouncedthissummerthattheArctic,nottherainforest,spawnedmanyplantsandanimalsthatlatermigratedtoNorthAmerica.SaysJohnSepkoskioftheUniversityofChicago,“Harshenvironmentsmaybeproducingthemajorchangesinthehistoryoflife.”

These“changes”donotresultmerelyinalongertailorabiggerclawforanexistingspeciesbut,rather,in