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1、Passage★★★☆☆Questions1to5arebasedonthefollowingpassage.Onenegativeresultofpeople'sinterferencewiththeenvironmentisthatmanykindsofanimalsarebecomingrare.Infact,theirnumbersaredecreasingsorapidlythattheyareindangerofbeingextinct.Becauseworriedandconcernedexpe
2、rtswanttomakesurethattheseanimalsdonotdisappear,an"endangeredspecies"listhasbeenmade,andwaystosavethemhavebeenstarted.Sometypesofbirds,likeeagles,areindangerofextinction.Thisisthereasonwhymanyconcernedcitizenshaveorganizedintogroupstotrytosavethebirds.TheNa
3、tionalAudubonSociety(NAS)isonesuchorganization.ThepeopleoftheNAS,ironically,oncetriedtoencourageinterestinbirds.Thepresentsituationindicatesthattheyweretoosuccessful.Nowadaysthesamepeoplearelookingforwaystoprotectthebirdsfromthepeoplewhowanttowatchthem.Just
4、afewyearsago,birdwatcherswerestereotypedasharmlessbutstrange:peoplethoughtofallbirdwatchersaseccentrichunterswhochasedtheirpreywithbinocularstoseebetterwith,insteadofgunstoshootwith.Stereotypesofbirdwatcherswerethesubjectsofjokesbecausethegeneralpublicdidno
5、tfindbirdsinteresting.However,withalittleeducationandadvertising,birdwatchingandbirdwatchersreallychanged.Birdwatchingbecameanationalpastime,aninterestinghobby,afavoritewaytospendleisuretime.BecauseoftheeffortsoftheNAS,thenumbersofamateurornithologists(鸟类学者
6、)havemultiplied.Nowbetweenfiveandtenmillionnon-professionalbirdwatcherssearchforaglimpseofagoldenpheasant,apygmyswift,orawhoopingcrane.Inthepastdecade,theNASmembershiphasquadrupled;suchanincreaseoffourtimesthenumberinonlytenyearsindicatesasurgeofenthusiasmf
7、orbirds.Unfortunately,thisgreatgrowthofinteresthasmeantanotherkindofinterest:theover-enthusiasmofsomeamateurornithologistshasresultedinharmingthebirdsandtheirhabitats,thespecialenvironmentsthatthebirdschoose.Forexample,bothvegetationandthenestingplaceshaveb
8、eentrampled;thenaturalplaceshavebeendestroyedbythefeetofthesmallpercentageofoverlyenthusiasticwatchers.Oneprofessionalornithologistreportedthatsomanypeoplehavebecomeinterestedinbirdsthatonerarebirdcanb
