英语强化练习四

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1、高三英语强化练习I阅读理解Afteryearsofheateddebate,graywolveswerereintroducedtoYellowstoneNationalPark.FourteenwolveswerecaughtinCanadaandtransportedtothepark.Bylastyear,theYellowstonewolfpopulationhadgrowntomorethan170wolves.GraywolvesoncewereseenhereandthereintheYellows

2、toneareaandmuchofthecontinentalUnitedStates,buttheyweregraduallydisplacedbyhumandevelopment.Bythe1920s,wolveshadpracticallydisappearedfromtheYellowstonearea.TheywentfarthernorthintothedeepforestsofCanada,wheretherewerefewerhumansaround.Thedisappearanceofthewo

3、lveshadmanyunexpectedresults.Deerandelkpopulations一majorfoodsourcesforthewolf一grewrapidly.Theseanimalsconsumedlargeamountsofvegetation（植被），whichreducedplantdiversityinthepark.Intheabsenceofwolves,coyotepopulationsalsogrewquickly.Thecoyoteskilledalargepercenta

4、geofthepark，sredfoxes,andcompletelydroveawaythepark，sbeavers.Asearlyas1966,biologistsaskedthegovernmenttoconsiderreintroducingwolvestoYellowstonePark.Theyhopedthatwolveswouldbeabletocontroltheelkandcoyoteproblems.Manyfarmersopposedtheplanbecausetheyfearedthat

5、wolveswouldkilltheirfarmanimalsorpets.Thegovernmentspentnearly30yearscomingupwithaplantoreintroducethewolves.TheU.S.FishandWildlifeServicecarefullymonitorsandmanagesthewolfpacksinYellowstone.Today,thedebatecontinuesoverhowwellthegraywolfisfittinginatYellowsto

6、ne.Elk,deer,andcoyotepopulationsaredown,whilebeaversandredfoxeshavemadeacomeback.TheYellowstonewolfprojecthasbeenavaluableexperimenttohelpbiologistsdecidewhethertoreintroducewolvestootherpartsofthecountryaswell.28.Whatisthetextmainlyabout?A.Wildliferesearchin

7、theUnitedStates.B.PlantdiversityintheYellowstonearea.C・Theconflictbetweenfarmersandgraywolves.D.ThereintroductionofwolvestoYellowstonePark.29.Whatdoestheunderlinedword"displaced^inparagraph2mean?A.Tested.B.Separated.C・Forcedout.D.Trackeddown.30.Whatdidthedisa

8、ppearanceofgraywolvesbringabout?A.Damagetolocalecology.B.Adeclineinthepark/sincome.C・Preservationofvegetation・D.Anincreaseinthevarietyofanimals.31.Whatistheauthor^attitudetowardstheYellow