【TheVineThatAtetheSouthKudzuisafast-growingvine（蔓生植物）thatcoversalargeareainthesouthernUnitedStates．Itissocommonthatonemightthinkitisanativeplant，butitisnot．KudzuwasbroughttotheUnitedStatesfrom】
TheVineThatAtetheSouth
Kudzuisafast-growingvine（蔓生植物） thatcoversalargeareainthesouthernUnitedStates．Itissocommonthatonemightthinkitisanativeplant，butitisnot．KudzuwasbroughttotheUnitedStatesfromJapanin1876．ManyAmericansthoughtitwasbeautiful，andtheybegantoplantit．Theydidn’tknowitcouldgrowuptoafootadayduringthesummermonths．Nordidtheyknowitwouldgrowupandoveranythinginitspath（路径）．
InJapan，kudzuexperiencedcoldwintersandashortgrowingseason．ButintheUnitedStates，ithasaverylonggrowingseasonwithwarmandwetsouthernweather．Itisfineweatherforthevinetogrowfast．
Inthe1920s，peopleusedthevinetofeedfarmanimals．Tenyearslater，thegovernmentsupportedtoplantkudzubecauseitkeptsoil（土壤） fromwashingaway．However，bythe1950s，thegovernmentnolongerwantedpeopletoplantthevine．Twentyyearsafterthat，thegovernmentsaiditwasaharmfulplant．
Thevinegrowsuptreesandbuildings，makingsomebeautifulshapes．However，treesdieafterkudzucoversthembecausetheycannotgetenoughlight．Scientistsarelookingforwaystokillthevine．Theyusedpoisons（毒药） tokillthevine．However，someofthepoisonsmadeitgrowevenbetter．ScientistsalsofinditdifficulttodigupKudzu．Theplantisreallytough．
Becausekudzuissohardtokill，somepeoplearemakingthebestofit．Sotheytrytofinddifferentusesforthevine．Theyfindthevinecanbeusedtomakepaperandbaskets，itcanbeusedtofeedthegoats，anditcanevenbeeatenbypeople．Scientistsarestudyingitinthehopethatthevinecanbeusedasamedicine．Attheveryleast，kudzuservesasanexampleoftheunexpectedresultsthatcancomefromnon-nativeplants．
42．Wecanlearnfromthepassagethat．___
A．kudzumostlygrowsinthenorthernAmerica
B．kudzuwasbroughttoJapanfromAmerica
C．kudzugrowsveryfastinwarmandwetweather
D．Americangovernmenthasneversupportedtoplantkudzu
43．Theunderlinedword“tough”inParagraph4probablymeans“___”．
A．noteasilybroken B．widelyused
C．hardtogrow D．importanttoone’shealth
44．Thelastparagraphismostlyabout___．
A．howquicklyth