高中英语 Unit 5 First aid 单元自测 新人教版必修5.doc

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1、Unit5Firstaid三、单元自测1.完形填空阅读下面短文，掌握其大意，然后从21—30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。词数：221完成时间：14分钟难度：***AccordingtotheWorldHealthOrganization,malaria(疟疾),adiseasespreadbymosquitoes,affectsmillionsofpeopleeveryyear.Everyoneknowshowannoyingthe21madebyamosquito,followedbyapainfulreaction

2、toitsbite,canbe.Itis22thatsolittleisknownaboutmosquitoes,giventhelevelofpainand23causedbytheseinsects.Weknowthatthemost24chemicalforprotectingpeopleagainstmosquitoesisdiethyltoluamide,commonlyshortenedtodeet.Thoughdeetworkswell,ithassomeserious25:itcandamageclothesandsomepeoplearea

3、llergictoit.Scientistsknowthatmosquitoesfindsomepeoplemoreattractivethanothers,buttheydonotknowwhy.Theyalsoknowthatpeople26intheirreactionstomosquitobites.Onepersonhasapainfulswellingwhileanotherwhoisbittenbythesamemosquito,mayhardlynotice.Scientistshavenotyetdiscoveredthereasonfor

4、this,buttheyhave27experimentstoshowthatmosquitoesareattractedto,orputoffby,certainsmells.28,scientistswillbeabletodevelopasmellthatmosquitoescannot29inthefuture.Thiscouldbeplacedinanetto30mosquitoesthatflyin.Forthetimebeinghowever,wehavetocontinuesprayingourselveswithunpleasantliqu

5、idsifwewanttoavoidgettingbitten.21.A.voiceB.noiseC.songD.cry22.A.astonishingB.commonC.impossibleD.boring23.A.diseasesB.guiltyC.sorrowD.panic24.A.expensiveB.effortlessC.effectiveD.limited25.A.chemicalsB.illnessC.reactionsD.drawbacks26.A.putB.takeC.varyD.balance27.A.passedoutB.takeno

6、utC.carriedoutD.putout28.A.ThankfullyB.HopefullyC.LuckilyD.Obviously29.A.resistB.findC.waitD.escape6用心爱心专心30.A.boxB.placeC.findD.trap[答案解析]21．B名词辨析。noise和voice都可以指声音，但前者指的是人们不愿听到的“噪声”；voice则指说话和唱歌的“噪音”。由语境可知蚊子的声音应属于前者。22．A形容词辨析。前文提到“adiseasespreadbymosquitoes，affectsmillionsofpeopl

7、eeveryyear”。故选astonishing令人惊讶的。句意为：考虑到由这些昆虫引起的痛疼和疾病．我们对于蚊子的了解却少得令人吃惊。it作形式主语，真正的主语是后面that引导的从句。common普遍的；impossible不可能的；boring令人烦恼的。23．A名词辨析。文章开篇就告诉我们蚊子传播疾病的严重性(affectsmillionsofpeopleeveryyear)。其他各项sorrow(悲痛)、panic(惊慌)都不符合语境。24．C形容词辨析。这里讲的是防止蚊子叮咬的药物，其效果很好(workswell)，所以应是最有效的(effec

8、tive)。expensive昂贵的；effortl