2015届《创新设计》高考英语(北师大版)一轮活页训练(提升版)：7.21 Unit 21 Human Biology

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1、Unit21　HumanBiologyⅠ.完形填空Almosteveryonewantstogetsmarter.Westruggletoimproveour__1__，intelligenceandattention.Wedrinkcupaftercupofcoffeetohelpus__2__theday.__3__，anewstudypublishedinCurrentDirectionsinPsychologicalSciencewarnsthatthereare__4__tohowsmarthumanscanget.Eachofourbodypartsdevelopsinacerta

2、inwayforareason.__5__，wearenot3meterstall__6__mostpeople'sheartsarenotstrongenoughtosend__7__upthathigh.Scientistssaythatourthinkingabilityworksinthesameway.Ababy'sbrainsizeislimitedbyaseriesof__8__，suchasthesizeofthemother'spelvis(骨盆)．Ifourbrainsdevelopedtobebigger，therecouldbemore__9__duringchildb

3、irth.ThestudyofJews，whohaveanaverageIQmuch__10__thanotherEuropeans，showedtheyweremore__11__todevelopdiseasesofthe__12__system.Thismightbebecauseoftheirincreasedbrainpower.Ifintelligencecannotbeimproved，canweatleastgetbetterat__13__？Notreally，sayscientists.Theystudied__14__likecaffeine(咖啡因)thatimprov

4、eattention.Theyfoundthedrugsonlyhelpedpeoplewithserious__15__problems.Forthosewhodidnothavetroublepayingattention，thedrugscouldhavethe__16__effect.Scientistssaythatthissuggeststhereisa(n)__17__limittohowmuchpeoplecanorshouldconcentrate.Ourmemoryisalsoa“double－edgedsword”．Peoplewithextremelygoodmemor

5、iescould__18__havingadifficultlifebecausetheycannot__19__badthingsthathappentothem.ThomasHills，oneoftheauthorsofthepaper，saidthat__20__alltheproblemsintryingtogetsmarter，it'sunlikelythattherewilleverbea“supermind”．【语篇解读】每个人都想使自己变得更聪明，你是否也在想方设法改善自己的记忆力和注意力呢？　　　　　　　　　　　　　　　　　　　1．A.abilityB．characterC．

6、memoryD．emotion答案　C　[几乎每个人都想变得更聪明。“我们”都想努力提高“我们”的记忆力、智力和注意力。]2．A.gothroughB．putthroughC．getthroughD．carrythrough答案　C　[我们一杯接着一杯地喝咖啡来度日。]3．A.ThoughBThereforeC．HoweverD．Meanwhile答案　C　[文章第2段和第1段在意思上为转折关系，故选however。]4．A.standardsB．measuresC．rangesD．limits答案　D　[然而，一项新研究警告说，人类的聪明程度是有限度的。]5．A.AtfirstB．Inadd

7、itionC．ForexampleD．Aboveall答案　C　[“我们”的身体器官如何发育是有一定道理的，·4·就像我们的身高不会达到3米一样。forexample用于举例。]6．A.untilB．becauseC．beforeD．sothat答案　B　[因为大多数人的心脏不够强。]7．A.bloodB．informationC．breathD．strength答案　A　[不能够将血液输送到那个