1、Unit 3 Conservation课时作业(十七)Unit3PartWritingWorkshop, ViewingWorkshop&ReadingClub.阅读理解ABloodFallsareatthetipofagiantglacierinAntarctica.Asitsnamesuggests, theicyfaceofBloodFallsisredbutnotfromblood.Instead, thewatergetsitscolorbecauseitsrichiniron.Whenthewatercomesoutfromitsundergroundbeginnings, the
2、ironisexposedtotheairandquicklyformstheredrust.Ascientistrecentlystudiedtherustywaterandcameupwithsomesurprisingresults.ThewaterthatfeedsBloodFallsprobablycomesfromasaltyundergroundlake.Itshometomicrobesthatsurprisinglydontneedoxygentosurvive.“Thissaltylakeisasortoftimecapsule，”saidJillMikucki, whol
3、edthestudy.Whensheandherteamstudiedthewater, theyfoundnooxygenbutlotsofiron.Theysuspectedthattheunderwaterlakeformedwhenagiantglacier, now1,300feetthick, movedoverthesaltylakeatleast1.5millionyearsago.Thistrappedthewaterandeverythinginitinanoxygenfreeenvironment.Unlikehumanbeingsandmostotherformsofl
4、ife, themicrobesfromBloodFallsdontneedoxygentolive.Instead, theyareabletoexistusingtheiron.Thestudygivesusmoreinformationaboutourownplanet.Itmaybeusefulinotherscientificareaslikethesearchforlifeonotherplanets.IfscientistsfindlivingthingsontheEarththatliveonironinsteadofoxygen, researchersmighthaveab
5、etterideaofwheretolookforlifeelsewhere.1ForwhatdoBloodFallsgetthename?ATheyarerichinoxygen.BTheyreflecttheirredsurroundings.CTheirwaterrichinironisred.DTheyarecomposedofblood.2WhatprobablymadeJillMikuckimostsurprised?AThediscoveryofasaltyundergroundlake.BMicrobesthatdontneedoxygentosurvive.CThemovem
6、entofagiantglacier.DThecolorofBloodFalls.3WhydidJillMikuckibelievethissaltylakeisasortoftimecapsule?ABecauseitwasformedbyagiantglacier.BBecauseitcouldbeusedtostudylifeonotherplanets.CBecauseitwashometospecialmicrobes.DBecauseitwasformedmorethan1.5millionyearsago.4WhatdothemicrobesfromBloodFallsliveo
7、n?AAir.BWater.CIron.DOxygen.B“Youcanusemeasalastresort (选择), andifnobodyelsevolunteers, thenIwilldoit.”ThiswasanactualreplyfromaparentafterIputoutarequestforvolunteersformykidslacrosse (长曲棍球) club.Iguessthattheresprobablysomedemandingworkschedule, orsocialanxietyaroundsteppinguptohelpforanunknownspo
8、rt.Shemayjustneedalittlepersuading.SoItryagainandtug_at_the_heartstrings.ImentionthesingleparentwithfourkidsrunningtheshowandItalkaboutthedadcoachingateamthathiskidsarentevenon.Atthispointtheunwillingparentspeaksup, “Alright.Yes, Illdoit.”ImsecretlyrelievedbecauseIknowtheresrealpowerinsharingvolunte
9、erresponsibilitiesamongmany.Theunwillingparentorganizesthemealschedule, sendsoutemails, andcollectsmoneyforendofseasongifts.Somewherealongtheway, thesameparentendsupbecominganinvaluablememberoftheteam.Thecoachisabletofocusonthekidswhiletheotherparentsarerelievedtobeoffthehookforanotherseason.Handing
10、outslicedorangestobloodthirstykidscanbeasexcitingaswatchingyourownkidscoreagoal.Still, mostofusvolunteersbreatheasighofreliefwhentheseasoncomestoaclose.Thatreliefiscoupledwithadeepunderstandingofwhythesamepeoplekeepcomingbackformore：Connectingtothecommunity (社区) asyoufreelygiveyourtime, money, skill
11、s, orservicesprovidesarealjoy.Volunteeringjustfeelssogood.Inthatsense, ImprettysurevolunteeringismoreofaselfishactthanIdfreelyliketoadmit.However, ifothersbenefitintheprocess, andIgetsomerewardtoo, doesitreallymatterwheremymotivationlies?5Whatcanweinferabouttheparentfromherreplyinparagraph1?ASheknow
12、slittleabouttheclub.BSheisntgoodatsports.CShejustdoesntwanttovolunteer.DShesunabletomeetherschedule.6Whatdoestheunderlinedphrase“tugattheheartstrings”inparagraph2mean?AEncourageteamwork.BAppealtofeelings.CPromotegooddeeds.DProvideadvice.7Whatcanwelearnabouttheparentfromparagraph3?AShegetsinterestedi
13、nlacrosse.BSheisproudofherkids.CShellworkforanotherseason.DShebecomesagoodhelper.8Whydoestheauthorlikedoingvolunteerwork?AItgivesherasenseofduty.BItmakesherveryhappy.CItenableshertoworkhard.DItbringshermaterialrewards.七选五Sleepinginclasspreventsyoufrompayingattentiontotheteacheraswellasstopsyoufromle
14、arningaboutthematerialthatisbeingtaught._1_Itisimportanttodeterminewhyyouarefallingasleepinclassandtrytochangethesituationsothatyouareabletostayawakeandpassallofyourclasses.Thereareanumberofdifferenttricksyoucanusetotrytostayawake.Getafullnightssleeponschoolnights.Itisreportedthatteenagersmayneedmor
15、esleepthanadults._2_Thisisakeyparttostayingawakeinclass.Ifyouarenottired, youareunlikelytofallasleep.Eatahealthybreakfastfullofnutritiousfood._3_Ifyougethungryortiredinthemiddleoftheday, tryeatingahealthysnacklikeapieceoffruitorsomebiscuits._4_Ifyouareactivelyengagedintheinformationtheteacherisprese
16、nting, youarelesslikelytodozeoff.Takingnotes, askingquestionsandotherwisegettinginvolvedinclassroomactivitiesanddiscussionswillmakeyoufarlesslikelytodozeoff.Contactyourdoctorinordertoruleoutmedicalconditionsthatcancauseyoutofallasleep._5_Prescriptiondrugsmayalsocausesleepinessasasideeffect, sodiscus
17、sanymedicineyouaretakingwithyourdoctor.AGetinvolvedduringclass.BEarlytobed, earlytorise.CSleepingmorehelpsalotinyourstudy.DItcanalsogetyouintroublewithyourteachers.EItcanprovideyouwithenoughproteintofuelyourbody.FGotobedearlierandmakesureyougetasmanyhoursofsleepasyourbodyneeds.GIfyouhaveamedicalcond
18、itionthatiscausingyoutofallasleepinclass, itwillneedtobetreatedbyaprofessional.课时作业(十七).阅读理解A【语篇解读】本文是一篇说明文。科学家在南极洲发现了神奇的、富含铁元素的“血瀑布”，此次发现提供给我们许多有关地球的信息，这对地球生命的研究也许具有划时代的意义。1答案与解析：C推理判断题。由第一段中的Instead, thewatergetsitscolorbecauseitsrichiniron.Whenthewatercomesoutfromitsundergroundbeginnings, theiron
19、isexposedtotheairandquicklyformstheredrust.可以判断，“血瀑布”之所以有此名是因为水里富含铁元素，而铁暴露在空气中，很快就会形成红色的铁锈。2答案与解析：B细节理解题。由第二段中的.surprisinglydontneedoxygentosurvive.并结合第三段可知，这些微生物不需要氧气就能生存，这一点令她感到惊奇。3答案与解析：D推理判断题。由第三段中的Theysuspectedthattheunderwaterlakeformedwhenagiantglacier, now1,300feetthick, movedoverthesaltylak
20、eatleast1.5millionyearsago.可以得出正确选项。4答案与解析：C细节理解题。由第四段中的Instead, theyareabletoexistusingtheiron.可知这些微生物依靠铁元素生存。B【语篇解读】本文是一篇记叙文。主题语境为人与社会，主题语境内容为志愿服务。文章记述了作者请一位家长做志愿者的故事。文章侧重社会服务和人际沟通素养的培养。5答案与解析：C推理判断题。本题题干意为：从第一段那位家长的回答中我们可以推断出关于她的什么？文章中，那位家长的回答是“你可以把我作为最后一个选择，如果没有其他人愿意当志愿者，那么我就做”。根据其回答可以知道，她其实是不太愿
21、意做志愿者的，故C项正确。6答案与解析：B词义猜测题。本题题干意为：第二段中的画线短语“tugattheheartstrings”的意思是什么？根据上下文可知，此处表示“我”又试了一次，这回开始打感情牌。画线短语意为“触动心弦”，故B项正确。A：鼓励团队合作；C：促进良好行为；D：提供建议。7答案与解析：D推理判断题。本题题干意为：从第三段中，我们能够得知那位家长的什么情况？在文章的第三段，作者记述了那位家长在活动中所做的事情，即安排饮食计划、发送邮件、募集资金等，她成了团队中一个重要的成员。因此D项(她成了一个好助手)正确。8答案与解析：B推理判断题。本题题干意为：为什么作者喜欢做志愿工作？
22、根据文章倒数第二段中的“Connectingtothecommunity.providesarealjoy”以及“Volunteeringjustfeelssogood.”可知，作者认为，做志愿工作能让她开心。故B项正确。A：这给予她一种责任感；C：这让她能努力工作；D：这给她带来了物质上的回报。.七选五【语篇解读】本文为指导类说明文。课堂上睡觉会妨碍你听讲。弄清楚你课上睡觉的原因并改变这种状况对你的学习非常重要。文章就“如何应对上课睡觉以保持头脑清醒”提供了几种有效的方法。1答案与解析：D本空前一句介绍了上课睡觉的害处。根据D选项中的also可以判断，此选项也在讲上课睡觉的影响，故D选项符合前后逻辑，内容上也相关，故选D。2答案与解析：F该空所在段落主题句为第一句话，即“上学时的晚上要得到充足的睡眠”，故F项与本段主题相符。3答案与解析：E由本段主题Eatahealthybreakfastfullofnutritiousfood.可以判断，该空所表达意思与饮食营养有关，故选E项。4答案与解析：A根据文章特点可以判断此空为祈使句，并且是本段主题句。再根据本段内容可以判断应选A，即“积极参与课堂”。5答案与解析：G根据本段语境为药物导致睡眠可以判断G项为最佳选项。
