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Unit4EarthquakesI.阅读理解APeople lovecellphones,which iswhy ninein tenAmericans ownone.But doesheavy useofcellphones posea risk of cancerThis questionhas causedcontroversy formany years.A newstudyin ratsnow augmentsthose concerns.Its data linked long-term,intense exposure toradiation fromcellphones withan increasedrisk ofcancer in the heartor brain.The resultshaveyet tobe confirmed,the authors note.Indeed,although therat studyfound alink between cellphone radiationand cancer,it offersnoclues towhy suchalinkmight exist,notes Jonathan Samet.He teachespreventative medicineanddirects theInstitute forGlobal Healthat theUniversity ofSouthern Californiain LosAngeles.Still,he callsthe new studys findings“significant”.They couldlead tostudiesresearching howcellphone radiationmight cause cancer,he says.Phone signals are relayedbetweencelltowers andcellphones viaradio waves.This radiofrequency—or RF—radiation isa typeknown asnon-ionizing（非电离的）・Unlike X-rays,non-ionizing radiationdoes notdeposit enoughenergy into cells to release electrons from atomsormolecules,producing ions.So ittends tobe far less harmful than ionizing radiation,suchas X-rays.But thatdoes notmean radiowaves mightnot causeharm.In verylarge doses（S）this radiationwill heat the bodyand causetissue damage.But itsnotyet knownwhat muchlower RFlevels mightdo,such asthose fromcellphone use.Five yearsago,the WorldHealth Organization，s InternationalAgency forResearch onCancer,or IARC,concluded thatcellpho.ne use“is possiblycarcinogenic（致癌的）”.Its conclusionwas basedon whatlittle researchdata wasavailable atthat time.But noticethatIARC wasnot certain.It saidonly thatphone usemight“possibly”causecancer.Soscientists atthe National Toxicology Program,or NTP,investigated further.［语篇解读］本文是一篇说明文人们喜欢用手机，90%的美国人都有手机那么，过度使用手机是否会有患癌的风险呢？一项新的研究给出了一些线索everyone pleasebring alongasmall giftfor thispurpose Rememberto packit up,sign yourname and a fewwords ofgoodwishes.Don，t missthe party,where Ibelieve wewill have a lotof Everyone is welcome.That，s all.Thank you.
1.Which of the followingcan replacethe underlinedword“augments”？A.figures outB.puts outC.refers toD.adds to解析词义猜测题画线词前面提到过度使用手机是否有患癌的风险这一问题多年来引发的争议不断,再根据画线词后的“concerns和Its datalinked long-term,intense exposuretoradiation fromcellphones withan increasedriskofcancer in the heartor brain.可知，现在一项在老鼠身上进行的新研究增加了那些忧虑故画线词与adds to意义相近答案D
2.In whichaspect doesJonathanSametthink thenewstudyin ratsis significantA.It assistshim withhis teaching.B.It indicatesa newresearch direction.C.It warnspeople tomind cellphonesafety.D.It makes a breakthroughin cancerresearch.解析推理判断题根据第二段中的“They couldlead tostudies researchinghow cellphoneradiationmight causecancer,he says.”可知，这项研究会促使科学家去查明手机辐射可能是怎样致癌的，也就是说它为科学家提供了一个新的研究方向答案B
3.What isParagraph3mainly aboutA.How phonesignalsaredelivered.B.How cellphonesproduce radiation.C.Features ofradiation fromcellphones.D.Differences betweenionizing andnon-ionizing radiation.解析段落大意题根据第三段的内容尤其是“non-ionizing radiationdoes notdeposit enoughenergyintocellstoreleaseelectronsfromatoms ormolecules,producing ions.So ittends tobefarlessharmfulthanionizingradiation...”可知，，本段主要讲的是手机辐射的特点，它是非电离的，其危害性远低于电离辐射答案C
4.What mightbe thetheme ofNTP scientistsfurther researchA.Why cellphone use causes cancer.B.Whether cellphoneuse reallycausescancer.C.What healtheffects cellphoneuse has.D.How muchexposuretocellphone radiationis safe.解析推理判断题根据最后一段中的“It saidonly thatphoneusemight possiblycausecancer.So scientistsattheNationalToxicologyProgram,or NTP,investigated further.可知，NTP的科学家进一步研究的主题可能是手机使用是否真的会导致癌症答案BBAmbar pressesher handto herforehead asshe considersthe questionon herscreen:how manysevensin91The ten-year-old hasbeen struggling with itfor abouta minutewhen shesmiles,“13!”Her tutorresponds byposting alarge smilingcat pictureon herscreen—the virtual（虚拟的）meaning ofa paton theback.He issitting onthe otherside of the worldin anonlinetutoring centrein India.Ambar,who attendsPakeman PrimarySchool inLondon,is one of nearly4,000primary schoolchildrenin Britainthat havesigned upfor weeklyone-to-one mathssessions withtutors basedinIndia andSri Lanka.The lessons,provided bya companycalled Third Space Learning,aretargeted at pupils strugglingwith maths一particularly thosefrom disadvantagedbackgrounds.From nextyear,the platformwill becomeoneofthe firstexamples ofartificial intelligence（AI）software being used to monitor,and ideallyimprove teaching.Together withsome Britishscientists,the companyhas analysedaround100,000hours ofaudio andwritten datafrom itstutorials（辅导课），with thegoal ofidentifying whatmakesagood teacherand asuccessfullesson.Tom Hooper,the company，s CEO,said,Weve recordedevery lessonthat we，ve everdone.By11sing the data,we，ve beentrying tointroduce AIto improve the teaching.”But heargued thatntheaim isnot toreplace teacherswith robots.“Theres aslightly dubious（不确定的）conversation abouthow AIwill makehumans irrelevant,but it，snot at allabout replacinghumans,h„e said.Our wholebelief isthat forchildren notdoing wellin thesubject,people arewhatmatters.”Pupils onthe programhavea45-minute sessionwith the same tutoreach week.They communicatethrougha headsetandashared“whiteboard”.The lessonsat PakemanPrimarySchool aretailored to the individual,including visualrewards linkedto thechildsinterests.In additiontotheraw audiodata,each lessonhas varioussuccess metricsattached howmany problemsare completed,how usefulthe pupilfinds thesession,how thetutor ratesit.［语篇解读］本文是一篇说明文数学成绩不好怎么办？没关系坐在家里，你就可以享受高科技公司Third SpaceLearning为你提供的一对一网上教学服务
5.Why doesthe authormention Ambarin thebeginningA.To praiseher tutor.B.To showher strugglewith maths.C.To introducea company.D.To encouragepupils tolearn mathsonline.解析推理判断题第一段提到了Ambar在网上接受一对一的数学教学，该网上家教中心位于世界的另一端印度由此引出下文介绍的一家公司Third SpaceLearningo故作者在文章一开始提到Ambar是为了引出这家公司答案C
6.What dowe knowabout ThirdSpace LearningA.It makesgood teachersand lessons.B.It isaimed atstudents frompoor backgrounds.C.It isbeingusedtomonitorand improveteaching.D.It providesonline mathslessons forschoolchildren.解析推理判断题根据第二段中的usigned upfor weeklyone-to-one mathssessions withtutorsbased inIndia andSri Lanka...are targetedatpupilsstrugglingwithmaths”可知，ThirdSpaceLearning为小学生提供网上一对一的数学课程，故选D项答案D
7.Which mayTom Hooperagree withA.AI makeshumans irrelevant.B.AI isbeneficial toteaching.C.Robots aresmarter thanhumans.D.Robots willreplace humans.解析推理判断题根据第四段中的“By usingthedata,weve beentrying tointroduce AItoimprovetheteaching.可知，Hooper;认为AI对教学是有好处的，故选B项答案B
8.What is the lastparagraph mainlyaboutA.What istaught in the lessonB.How isthe lesson taughtC.Who learnsthe lessonD.Why.isthelessontaught解析段落大意题根据最后一段的内容可知，本段主要介绍了这种课的教学模式故选B项答案BII.完形填空Hello,Mr.Wi-Fi.Life without you isnext toimpossible now.We rehappy tosing yournamefrom morningtill evening,sometimes tilldawn.1I knowyou helpme,sometimes youre makingmedo thingswith2attention.Many timesI promisemyself thatr113my feelingstowards you,but youre4me closerand closer...Youve enteredboth myhome andmy5You rejust a windowfor our6and information.But wepeople aren，t7only withthe window.So weopen allour8foryou.Is thisan9or somekind ofattachment Ifthis isan illness,is itcurableAnd ifthis isan attachmentwill you10me tothe lifelongtogethernessWe wantyou24/
7.Can，tyoutake afew daysoff sothat bothyou andI can11You，re apoison一not aslow onebut asuper12poison whichholds ourmind and makes usdance13i tstune.Nowadays youreso14that anyone can buyandmakeyou our
15.You，11never bebotheredabout ourhealth but we1116be concernedaboutyour“health”.Because youaccompany useverywhere andnever letus bealone.If youwere a17person madeof fleshand blood血肉之躯would welove youthesameYou18us with.your numerous talents andwe evencan，t getrid ofyou.We，re allyour19,SometimesI wonderhow peoplein theprevious generations20_,but ifthey didwhy can，twe［语篇解读］作者用诙谐的语气质问Wi-Fi,这呈现了现代人的一种通病，那就是对无线网络的依赖
1.A.Now thatB.Only ifC.Though D.When解析根据语境可知，虽然Though作者知道Wi-Fi帮助了自己，但是正是Wi-Fi的特殊作用让作者在做事情的时候会分心答案C
2.A.praised B.increasedC.focused D.divided解析参见上题解析答案D
3.A.keep inB.bring backC.approve ofD.give up解析根据语境可知，作者很多次都对自己承诺说要抑制keep in自己对Wi-Fi的情感bring back使回忆起，使想起；approve of”同意，赞成；give up“放弃”答案A
4.A.drawing B.pushingC.forcing D.observing解析根据语境可知，此处形象生动地表现了作者不能抗拒Wi-Fi对自己的吸引draw“吸弓|”符合语境push“推，催促”；force强迫，迫使；observe“观察”答案A
5.A.space B.soulC.society D.workplace解析Wi-Fi进入了作者的家和灵魂中下文中的“holds ourmind”是关键提示答案B
6.A.entertainment B.argumentC.expansion D.struggle解析:Wi-Fi本来只是我们娱乐entertainment和获取信息的窗口argument争论；expansion“扩张”；struggle斗.争,奋斗”答案A
7.A.strict B.satisfiedC.generous D.busy解析根据上文的“Youre justawindowfor our...information.以及“But”所表示的转折关系可知，此处表示人们并不满足于satisfiedWi-Fi仅仅是个“窗口window vo strict“严格的；generous“慷慨的；busy“繁忙的”答案B
8.A.thoughts B.eyesC.exits D.doors解析此处表示人们将Wi-Fi的作用扩大化，不仅仅满足于其作为窗口的作用，而是将所有的“门doors”打开迎接Wi-Fi某种程度上而言，door是window的“升级版”答案D
9.A.disease B.inspirationC.routine D.phenomenon解析:结合下文中的“an illness”可知，作者疑惑的是自己和其他人对Wi-Fi如此依赖的现象是否是一种病disease oinspiration“灵感”；routine“惯例”；phenomenon“现象”答案A
10.A.recommend B.instructC.commit D.adapt解析如果对Wi-Fi的情感是一种依赖的话，Wi-Fi能保证与作者一生都亲密无间吗？commit意为“保证做某事、遵守协议或遵从安排等，承诺”，符合语境recommend“推荐；instruct“教导”；adapt“适应”答案C
11.A.persist B.relaxC.progress D.balance解析Wi-Fi不能给自己放几天假以便它和作者都能放松relax一下吗？persist“坚持“；progress“行进”；balance“平衡”答案B
12.A.raw B.ambiguousC.strong D.fast解析根据本句中的“notaslow one”可知，Wi-Fi并不是慢性毒药，而是快速起效的毒药，故用fast与slow形成对比raw“不熟练的；ambiguous“含糊不清的”；strong“强壮的”答案D
13.A.to B.againstC.from D.within解析Wi-Fi是一种能控制人们的思想并使人们随着它的音调起舞的毒药to表示“随着”答案A
14.A.affordable B.valuableC.conventional D.attractive解析根据下文中的anyonecanbuy”可知,如今Wi-Fi的价格是如此低廉以至于任何人都能买到，并使其成为人们的伴侣affordable”支付得起的，不算太贵的”；valuable“有价值的；conventional“传统的；attractive”有吸引力的”答案A
15.A.addition B.expertC.companion D.instrument解析:参见上题解析下文中的uBecause youaccompany useverywhere andnever letus bealone.v亦是提示addition“添加物；expert“专家”；companion伴侣，伙伴”；instrument“工具”答案C
16.A.sometimes B.alwaysC.never D.seldom解析毫无生命的Wi-Fi是决不会在意其用户的健康的，但是用户们会一直担心Wi-Fi的“健康”，此处用always与上文的never形成对比，强调人们对Wi-Fi的在意程度答案B
17.A.selfish B.dishonestC.responsible D.real解析根据下文中的“person madeof fleshand blood（血肉之躯）”可知，作者想知道如果Wi-Fi成为拥有血肉之躯的真实的人，人们是否会一样喜欢它selfish“自私的”；dishonest“不诚实的；responsible负责任的；real“真实的”答案D
18.A.control B.scoldC.comfort D.challenge解析根据上文作者介绍的人们对Wi-Fi的依赖及下文中的“we evencan，t getrid ofyou”可知，人们离开了Wi-Fi简直无法生活下去，而本句中的with yournumeroustalents正是Wi-Fi控制人们的方式control“控制”；scold“责备”；comfort“安慰”；challenge“挑战”答案A
19.A.friends.B.slavesC.colleagues D.employers解析根据语境可知，Wi-Fi控制了人们，也就是说人们成了被其掌控的奴隶slavesfriend朋友；colleague“同事；employer雇主”答案B
20.A.suffered B.connectedC.survived D.surfed解析根据语境尤其是本句中的“intheprevious generationsv可知，作者非常疑惑的是在早期没有Wi-Fi的时候人们是如何存活survived下来的suffer“受苦”；connect“联系”；surf“冲浪”答案CIII.短文改错Boys andgirls,May Ihave yourfully attention,please Ihave announcementto make.To welcomeour friendsinthe UnitedStates,the StudentUnion wasgoing tohold aparty onSaturday evening,February
20.As never,the par.ty willbe heldinthelecture halloftheMain Building.They will beginat7pm.There willbe music,dancing,singing orexchange of gifts.Will everyoneplease tobringalong asmall giftfor thispurpose Rememberto packit up,sign yourname andwritinga fewwords ofgood wishes.Don，t missthe party,where Ibelieve wewill havea lotof funs.Everyoneiswelcome.That，s all.Thank you.答案Boys andgirls,May Ihave yourattention,please Ihaveannouncement tomake.To welcomeour friendstheUnitedStates,the StudentUniongoing tohold aparty onSaturday evening,February
20.As,theparty willbe heldinthelecture halloftheMain Building,willbeginat7pm.There willbemusic,dancing,singing exchangeofgifts.Will。
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