欢迎来到天天文库
浏览记录
ID:53265704
大小:467.50 KB
页数:6页
时间:2020-04-02
《高中英语《Unit 2 Heroes》Section Ⅱ SectionⅢ课下作业 北师大版必修1.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、SectionⅡ&SectionⅢⅠ.完形填空Foryearsscientistshavebeenworriedabouttheeffectsofairpollutionontheearth'snaturalconditions.Somebelievethe__1__insidemanyhousesmaybemoredangerousthantheairoutside.Itmaybeonehundredtimes__2__.Indoorairpollutioncan__3__apersontofeeltired,tosuffereyepain,h
2、eadacheandother__4__.Somepollutantscancausebreathingdisorders,diseasesofbloodand__5__cancer.Mostscientistsagreethateverymodernhousehassomekindof__6__pollution.Peoplepaymore__7__totheproblemnow.Itisthatwhenbuildersbeganmaking__8__andofficestheydidnotwanttowasteenergy.Todothist
3、heybuiltbuildingsthatlimitedtheflowofairbetweeninsideandoutside.Theyalsobegan__9__manmadebuildingmaterials.These__10__arenowknowntoletoutharmfulgases.__11__theproblembecamemoreserious,scientistsbegansearchingfora__12__todealwithit.Theydiscoveredanaturalpollutioncontrolsystem_
4、_13__buildinggreenplants.Scientistsdon'treallyknow__14__controlairpollution.Theybelievethataplant'sleavesabsorbor__15__pollutants.In__16__theplantletoutoxygenthroughitsleavesandtinyorganizationonitsroots.Scientists__17__thatallbuildingsshouldhaveonelargeplantorseveralsmallpla
5、ntsinsideeveryninesquaremetersofspace.__18__ofdifferentplantsshowthateachabsorbsdifferentchemicals.Sothemosteffectivewayto__19__theairistousedifferentkindsofplants.Havinggreenplantsinsideyourhousecanmakeitaprettierandmore__20__place.1.A.air B.lightC.healthD.atmosphere
6、2.A.lighterB.worseC.thickerD.heavier3.A.permitB.desireC.causeD.persuade4.A.pollutionB.gasesC.difficultiesD.problems5.A.atleastB.hardlyC.onlyD.even-6-6.A.actualB.looseC.indoorD.downtown7.A.fearB.attentionC.remarkD.store8.A.housesB.preparationsC.furnitureD.efforts9.A.usingB.res
7、istingC.valuingD.judging10.A.materialsB.tablesC.industriesD.drinks11.A.IfB.AlthoughC.AsD.Unless12.A.chanceB.instructionC.scientistD.way13.A.fromB.forC.withD.like14.A.waterB.plantsC.productsD.measures15.A.takeinB.putoffC.letoutD.giveout16.A.timeB.exchangeC.orderD.particular17.
8、A.suggestB.requireC.begD.order18.A.ColorsB.StudiesC.RootsD.Container
此文档下载收益归作者所有