2018年秋季高中英语 Unit 2 Working the land Period 4 Using Language课后阅读作业 新人教版必修4

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1、Unit2WorkingthelandPeriod4UsingLanguage课后阅读作业Ⅰ.阅读理解A　　Peopleusedtothinkthatwetlandswerewastedland.Developerswoulddrainthemwithditches(水沟),filltheminwithtonsofsoil,andbuildhouses,schools,andparkingareasonthem.Thenscientistsbegantorealizetheimportantrolewetlandsplayintheenvironment.　　Wetlandsact

2、likegiantsponges(海绵)duringstorms.Theysoakupextrastormwaterandafterwardreleaseitslowlybackintothewatercycle.Thishelpspreventflooding.Townswherepeoplehavedrainedwetlandshavefoundthatinabigstorm,theirstreetsandhomesareoftenfloodedbecausetherearenowetlandstosoakuptheexcesswater.　　Wetlandsalsoactas

3、giantfilterswherepollutantsareabsorbedanddissolvedovertime.Thoughwetlandscanbecomepollutedfromdumping,wastewater,andfertilizerrunofffromfarmfields,theyareabletoprocesssomepollutantsovertimebecauseofallthemicroorganismsandplantslivingthere.　　Wetlandsareespeciallyimportantforprovidinghomesandbre

4、edinggroundstomillionsofbirds,fish,andamphibiansworldwide.Manywetlandshavebecomenationalwildliferefuges(避难所),whereyoucangototakepicturesandlookatbirdsandanimals.　　TheEvergladesareahugewetlandthatoncecoveredmorethanfourmillionacresofsouthernFlorida.Sometimescalledthe“riverofgrass”,theEverglades

5、areashallowsheetofwaterthatslowlyflowedacrossagrassyplain.Inthelate1800speoplebegandrainingpartsoftheEvergladesfordevelopment.Roadswerebuiltandtownssprangup.TheEvergladesshranktohalfitsoriginalsize.CitieslikeMiamigrewupwhereoncetherewasathrivingwetland.Sewageandwastefromthecitieswerepumpedinto

6、theremainingwetlands.OvertimescientistsbegantoseetheimportanceoftheEverglades.Evenwithitssmallersize,theEvergladesfilteredthepollutantscomingfromthecities,absorbingtheworstofitlikeasewagetreatmentplant.DuringstormstheEvergladesprotectedthecitiesfromstormsurgeflooding.Theyalsoarejustagreatplace

7、tovisitandseewildlife.【语篇概述】本文讲述了湿地的重要性。-8-1.Thefirstparagraphisintendedtotellus______.A.wastedlandusedtobewetlandsB.peopledidn’tknowtheimportanceofwetlandsbeforeC.wetlandsusedtobeleftundisturbedD.wetlandscanbeusedforbuilding【解析】选B。推理判断