通用版 2019版高考英语一轮复习unit3inventorsandinventions高考拆组训练新人教版选修

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1、Unit3Inventorsandinventions练(一)　语言知识运用组块专练——练准度(限时：25分钟)Ⅰ.完形填空Resealable(可密封的)plasticbags—sometimescalledbyabrandname,suchasZiploc®—arethoselittleclearplasticbagsyouusetokeepyoursandwichesandchipsfresh.Theyusuallyhavesomesortofsealingmechanism,likeaplasti

2、czipper,whichallowsyoutosealthebagtokeep__1__out.Keepingairawayfrom__2__allowsthemtostayfreshlonger.Bacteriaandotherorganismsintheairwill__3__fooditemsovertimeifallowedtocomeinto__4__withthem.Sealedplasticbagskeeptheseorganisms__5__gettingtoyourfood.Resea

3、lableplasticbagscanbeusedformorethanjust__6__sandwiches,chipsandsnackstoschoolforlunch.They’realsousedtokeepleftovers__7__intherefrigerator.Manypeoplealsousethemto__8__foodinthefreezerforuseinthefuture.The__9__oftheresealableplasticbagstartedoutin1951atac

4、ompanynamedFlexigrip,Inc.Flexigrip__10__aplasticzipperfrompatentswhichwasboughtfrom__11__BorgeMadsen.Thesezipperswere__12__usedaspartsofbindersandbriefcases.Overtime,__13__，plasticzipperbagsweredeveloped.Eventually,in1968,DowChemicalCompany__14__tomarketi

5、tsZiploc®brandofresealableplasticbagstogrocerystores.Theyturnedouttobevery__15__.Today,thesetypesofbagsare__16__inmanydifferentsizesandstyles,fromsnackandsandwichbagstocraftandfreezerbags.Youcanalsobuybagswithexpandablebottomsthat__17__ontheirown.Somebags

6、evenallowyouto__18__foodinthemicrowave!However,nowmanypeopletrytouse__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

7、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．takeo

8、utC．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．ag