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1、选修8Unit3高考试卷分块专练Ⅰ.完形填空Resealable(可密封的)plasticbags—sometimescalledbyabrandname,suchasZiploc®—arethoselittleclearplasticbagsyouusetokeepyoursandwichesandchipsfresh.Theyusuallyhavesomesortofsealingmechanism,likeaplasticzipper,whichallowsyoutosealthebagtokeep__1
2、__out.Keepingairawayfrom__2__allowsthemtostayfreshlonger.Bacteriaandotherorganismsintheairwill__3__fooditemsovertimeifallowedtocomeinto__4__withthem.Sealedplasticbagskeeptheseorganisms__5__gettingtoyourfood.Resealableplasticbagscanbeusedformorethanjust__6__s
3、andwiches,chipsandsnackstoschoolforlunch.They'realsousedtokeepleftovers__7__intherefrigerator.Manypeoplealsousethemto__8__foodinthefreezerforuseinthefuture.The__9__oftheresealableplasticbagstartedoutin1951atacompanynamedFlexigrip,Inc.Flexigrip__10__aplasticz
4、ipperfrompatentswhichwasboughtfrom__11__BorgeMadsen.Thesezipperswere__12__usedaspartsofbindersandbriefcases.Overtime,__13__,plasticzipperbagsweredeveloped.Eventually,in1968,DowChemicalCompany__14__tomarketitsZiploc®brandofresealableplasticbagstogrocerystores
5、.Theyturnedouttobevery__15__.Today,thesetypesofbagsare__16__inmanydifferentsizesandstyles,fromsnackandsandwichbagstocraftandfreezerbags.Youcanalsobuybagswithexpandablebottomsthat__17__ontheirown.Somebagsevenallowyouto__18__foodinthemicrowave!However,nowmanyp
6、eopletrytouse__19__plasticbecauseofitseffectontheenvironment.Somanufacturersofresealableplasticbagshavetaken__20__tobecomemoreenvironmentallyfriendly.语篇解读:本文主要介绍了可密封塑料袋的用途及发展史.同时指出,为了减少污染,这种塑料袋的生产厂家也采取措施以使他们的产品更加环保.1、A.air B、waterC、dustD、fog解析:选A 由第二
7、段开头的“Keepingairaway”可知,此处指把空气阻挡在外面.2、A.plantsB、containersC、bagsD、foods解析:选D 根据下文中的“Bacteriaandotherorganismsintheairwill__3__fooditemsovertime”可知,此处指让空气和食物隔离,以便食物保鲜的时间长些,故选foods.3、A.bringinB、takeoutC、breakdownD、dealwith解析:选C 空气中细菌和其他微生物会分解食物导致食物变质.breakdown意
8、为“分解”.4、A.relationB、contactC、connectionD、contract解析:选B 如果细菌和其他微生物与食物接触,食物将会很快变质.contact意为“接触”；relation意为“关系”；connection意为“连接”；contract意为“合同”.5、A.fromB、againstC、throughD、beyond解析:选A keep...from..
