【人教版】2020届高考一轮英语复习 分块专练题 选修8 Unit 3 含解析.doc

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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__out.Keepingairawayfrom__2

2、__allowsthemtostayfreshlonger.Bacteriaandotherorganismsintheairwill__3__fooditemsovertimeifallowedtocomeinto__4__withthem.Sealedplasticbagskeeptheseorganisms__5__gettingtoyourfood.Resealableplasticbagscanbeusedformorethanjust__6__sandwiches,chipsandsnackstoschoolforlunch.They'realsous

3、edtokeepleftovers__7__intherefrigerator.Manypeoplealsousethemto__8__foodinthefreezerforuseinthefuture.The__9__oftheresealableplasticbagstartedoutin1951atacompanynamedFlexigrip,Inc.Flexigrip__10__aplasticzipperfrompatentswhichwasboughtfrom__11__BorgeMadsen.Thesezipperswere__12__usedasp

4、artsofbindersandbriefcases.Overtime,__13__，plasticzipperbagsweredeveloped.Eventually,in1968,DowChemicalCompany__14__tomarketitsZiploc®brandofresealableplasticbagstogrocerystores.Theyturnedouttobevery__15__.Today,thesetypesofbagsare__16__inmanydifferentsizesandstyles,fromsnackandsandwi

5、chbagstocraftandfreezerbags.Youcanalsobuybagswithexpandablebottomsthat__17__ontheirown.Somebagsevenallowyouto__18__foodinthemicrowave!However,nowmanypeopletrytouse__19__plasticbecauseofitseffectontheenvironment.Somanufacturersofresealableplasticbagshavetaken__20__tobecomemoreenvironme

6、ntallyfriendly.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

7、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...f

8、rom..