课时作业(十四) [模块5 Unit2Theenvironment](限时：30分钟)Ⅰ.单项填空1．Althoughtherobotappearedsmart,Jackstillhelddoubt________itcouldhelpdoctorsoperateonthediseasedpartofthepatientwithexpectedaccuracy.A．whetherB．asC．thatD．which2．________therightdecisions________thefuture,weneedtogetasmuchinformationaboutthesalesandmarketingaswecan.A．Making;concernedB．Make;concerningC．Tomake;concerningD．Tomake;concerned3．Ifwedon'tsellmoregoods，we'llhavetocutback________production________10%nextyear.A．upon;to B．on;byC．of;byD．for;to4．Whilebuildingatunnelthroughthemountain,________.A．anundergroundlakewasdiscoveredB．therewasanundergroundlakediscoveredC．alakewasdiscoveredundergroundD．theworkersdiscoveredanundergroundlake5．Thecampusshootingspreadthroughoutthecounty，________togreatconcernaboutstudents'safetyatschool.A．havingledB．ledC．leadingD．tolead6．________fromthespace,theearth,withwater________seventypercentofitssurface,lookslikeablueball.A．Seen;coveredB．Seen;coveringC．Seeing;coveringD．Seeing;covered7．Thestudent________inthegamesontheMP4duringclassdidn'tnoticehisteacherbehindhim.A．absorbedB．wasabsorbed9\nC．toabsorbD．absorbing8．Thenumberoftrafficaccidentscausedbydrinkingis________asthenumberofthosecausedbynondrinkingdriving.A．twiceasmanyB．manyastwiceC．astwicelargeD．twiceaslarge9．________severaltimes,theyoungscientiststillkeptonmakinghisexperiments.A．HavingbeenfailedB．HavingfailedC．ThoughfailedD．Becauseoffailed10．Asthesenewproductsarenotsellingwell，themembersoftheboardhavedecidedto________production.A．cutdownB．cutdowntoC．cutdownonD．cutoff11．Theworkersareallgoingouttomaketheoutput________threetimeswhatitwasfiveyearsago.A．growtoB．growupC．growbyD．growinto12．Sincenooneelsehasvolunteered,Sheilawillbe________foodforthetrip.A．responsibletosupplyB．responsibleforsupplyingC．takeresponsibilitiestosupplyD．responsibletosupplying13．Theboywashavinganoperationonthestomach，tears________downhischeeksquietly.A．flewB．flowingC．flownD．toflow14．Iwouldappreciate________，tobefrank,ifthegoodscouldbedeliveredassoonaspossible.A．youB．this9\nC．itD．myself15．Lily'smobilephonewasleftinataxiaccidentally，never________again.A．tofindB．tobefoundC．findingD．beingfoundⅡ.阅读理解Thetotalareacoveredbyrainforestswasoncefoundtobe14%oftheEarth'slandsurface.However,morethan50%oftheoriginalrainforestareaisdestroyed.Atpresent,rainforestscoveronly6%ofthelandarea.Naturalandhumanthreatsareresponsibleforthislossofrainforests.Someofthenaturalthreatstorainforestsarebelow:Oneofthemostdestructiveenvironmentalthreatstotherainforestiswildfire.Smallfiresdestroythegroundcoversandsmallplants.IntheUnitedStatesalone,rapidlyspreadingwildfireburnsdownmorethan1millionacresofforesteveryyear.Therainforestvegetationrequireswaterandotherplantgrowthfactorsfortheirsurvival.Longdryoftenweakenstheplants,makingthemsusceptible_todiseases,pestandfirebreakouts.Alsotyphoonsandstormsresultindamagetotherainforest,whicharebeyondrecovery.Threatstotherainforestcausedbyhumanactivitiesdifferfromnaturalthreats.Theycausecompletedamagetowoodlands,inwhichcaserecoveryisnearlyimpossible.Incaseofnaturalevents,somepartsoftheforestecosystemcontinuetowork,whichleadstoslowrecoveryoflosthabitats.Listedbelowaresomehumanthreatstotherainforest:Everyminute,thousandsofforesttreesarecutdownforuseinbuildinghousesandfurniture.Soalargenumberofancientforestsintheworldhavebeendestroyed.Alsotheriseinpopulationislinkedwithincreasedneedforfoods,whichinturn,isrelatedtodeforestationforagriculturalpractices.Airpollutionandwaterpollutionarecausingdamagetoeveryhabitat,includingtherainforest.Youmighthaveheardofacidrain,whichwhenfallsonleavesand9\nplantparts,causesburningsigns.Theneedforbamboosandtreesinpaperindustryisanotherthreattotherainforest.Millionsofplantsarecutdowntoproducepaper,soastomeetthegrowingdemandsofthepublic.Nodoubt,someofthereasonsforreducingrainforestscannotbeavoided.But,therearemanythingseveryindividualcandotohelpprotecttherainforests,suchasplantingtreesandreducingexploitationofforests.Introducingpublicawarenessprogramstoeducatepeopleabouttheimportanceofthisnaturalresourcewillsurelyhelpinconservingrainforests.16．InParagraph1,thewriterusesthedecreasingpercentageofrainforestcoverto________．A．provetheenvironmentalproblemismoreseriousB．showmorerainforestsareindangeracrosstheearthC．leadinthetopicofthreatstorainforestsD．remindreadersoftheimportanceofconservingrainforests17．Theunderlinedpart“susceptible_to”inParagraph3canbereplacedby________．A．lessimportanttoB．farawayfromC．resistanttoD．easilyaffectedby18．Howmanynaturalthreatstorainforestsarementionedinthepassage?A．Two.B．Three.C．Four.D．Five.19．Whichofthefollowingcorrectlydescribesthedifferencebetweennaturalandhumanthreats?A．Thedamagecausedbyhumanactivitiestowoodlandsisunlikelytorecover.B．Thedamagecausedbynaturaleventstorainforestscanrecovercompletely.C．Habitatsofforestsdamagedbynaturaleventscanrecoverslowly.D．Humanactivitiescausefewerthreatstorainforeststhannaturalevents.20．Accordingtothepassage,humanscausethreatstorainforestsbymanymeans9\nexceptby________．A．cuttingdownforesttreesB．pollutingtheenvironmentC．creatingmanmadeacidrainD．developingagriculturalproductionⅢ.任务型阅读请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意：每个空格只填1个单词。Inthepast,Americanfamiliestendedtobequitelarge.Itiscommonthatparentsraisefiveormorechildren.Overtheyears,thesizeofthefamilyhasdecreased.Onereasonforthisisanincreaseinthecostofliving.Onaverage,childrenattendschoolsformoreyearsthantheyusedto,makingthemfinanciallydependentontheirfamilieslonger.Moreover,childrennowadaysarebetterdressedandhavemoremoneytospendonentertainment.Theparentsusuallytaketheresponsibilityforalltheexpenses.Meanwhile,familiesarelessclosethantheyusedtobe.MoreandmoreAmericanmothersworkawayfromhome.Thebreakupofthefamilyoccurswhentheparentsdivorce.AlotofchildrenintheU.S.livepartoftheiryoungliveswithonlyoneparent.Brokenfamiliesusuallyresultinproblemsforchildrenandparentsalike.Childrenblamethemselveswhentheirparentsseparate.Theygrowupfeelingunsettledastheyaremovedbackandforthbetweenparents.Usuallyoneparentisresponsibleforraisingthechildren.Thesesingleparentsmustcareforthechildren'semotionalandpsychologicalneedswhilealsosupportingthemfinancially.Thisisverydemandingandleavesverylittletimefortheparent'sownpersonalinterests.Singleparentsoftenmarryothersingleparents.Inthistypeoffamily,unrelatedchildrenareforcedtodevelopbrotherorsisterrelationship.ThesituationsofmanyAmericanfamiliestodayarenotgood.However,recentsignsindicatethatthingsaregettingbetter.Thedivorcerateisdeclining.Therateofchildbirthisrising.PerhapsAmericanshavelearnedhowimportantfamiliesare.9\nTitleThe21.________ofthestructureofAmericanfamiliesIntroductionNowadaysthesizeofthefamilyhasbecome22.________thaninthepast.23.________forthesituation◆Thecostoflivingincreasesbecause☆thestayingofthechildrenatschoolis24.________.☆childrenliketowearbetterclothes.☆childrenpaymoremoneyfor25.________.◆Moremothersgooutforjobsbecausetheyarealso26.________forallthefamily'sexpenses.◆Thesingleparentfamilyincreasesbecauseofparents'27.________，whichleadstomanyproblems.☆Childrendon'tfeel28.________whentheyarebroughtupinbrokenfamilies.☆Theparenthaslittletimeforhis/herowninterestsbecauseoneparentistoo29.________takingcareofchildren.ConclusionThesituationsofAmericanfamiliesinthefuturemaygetbetterbecauseAmericanshavelearnedthe30.________offamilies.课时作业(十四)9\nⅠ.1.A 考查名词性从句。doubt表示不确定的含义，后面的同位语从句由表示疑问或不确定的连词连接。故选A。句意：尽管那台机器人看起来很聪明，但杰克疑惑不定，他不知道机器人是否能高精度地帮助医生在病患部位实施手术。2．C 考查非谓语动词。根据语境可判断首空为非谓语动词形式作目的状语，故用不定式短语，由此排除A、B两项；第二空用concerning，意为“关于”，可理解为介词。句意：为了做出关于将来的正确决定，我们需要尽可能多的销售和市场信息。3．B 题意：我们若不能增加货物的销售量，明年就必须降低百分之十的产量。cutbackon“削减，缩减”，是固定短语。by常用来表示程度和范围增减的幅度，符合题意。to表示减少或增加到。4．D 根据分词状语的逻辑主语是句子主语可判断选D。5．C 考查非谓语动词。句意：校园枪杀事件传遍了整个县，也引起了人们对学生在校安全的关注。Thecampusshooting和lead之间是主谓关系，并作spread的伴随状语，所以用leading。6．B 逻辑主语theearth和第一空的非谓语动词为被动关系，排除C、D两项。water与第二空非谓语动词为主动关系，排除A。7．A 根据短语“beabsorbedin”可判断选A，此处为过去分词短语作后置定语。8．D 考查倍数表达。thenumberof…作主语时，其表语要用large，不能用many；倍数词应放在同级比较句型中第一个as之前，综上所述本题应选D。9．B 逻辑主语theyoungscientist和该空非谓语动词为主动关系，其动作发生在主句谓语动词之前，故用现在分词的完成式。10．C cutdown砍倒/减缩(费用);cutoff切掉，割。根据题意“在产品方面缩减”，应选C。11．A growto增加到(同become)；growup长大；growinto变成。根据题意应选A。12．B beresponsiblefordoingsth.＝takeresponsibilitytodosth.负责做某事。13．B 考查非谓语动词。根据句子结构可知，主句的主语是Theboy，而tears则是flow的逻辑主语。在英语中两个句子主语不一致时，需要用独立结构来表达，即tearsflowingdownhischeeksquietly。原句为：Theboywashavinganoperationonthestomachandtearswereflowingdownhischeeksquietly.9\n14．C 考查句型“appreciateit＋if从句”，其中it作形式宾语。15．B 考查非谓语动词。句意：莉莉的手机忘在出租车里了，再也没有找到。手机是再也没有被找到，故用被动语态，所以用nevertobefound作结果状语。Ⅱ.本文主要介绍雨林覆盖率正在严重下降的原因。16．C 推理判断题。第一段陈述雨林覆盖率正在严重下降之后，立即引入“Naturalandhumanthreatsareresponsibleforthislossofrainforests.”，由此可判断选C。17．D 词义猜测题。根据“Longdryoftenweakenstheplants”可知，久旱能弱化植物，自然植物就易受疾病、害虫及火灾的影响了，故选D。18．B 细节理解题。由第二、三段可知，文章提到的naturalthreats有：wildfire，longdry和typhoonsandstorms，故选B。19．C 细节理解题。根据第四段“Incaseofnaturalevents,somepartsoftheforestecosystemcontinuetowork,whichleadstoslowrecoveryoflosthabitats.”可判断选C。20．C 细节理解题。根据第六段“Airpollutionandwaterpollutionarecausingdamagetoeveryhabitat,includingtherainforest.Youmighthaveheardofacidrain,whichwhenfallsonleavesandplantparts,causesburningsigns.”可知，有害植物的acidrain不是人类有意制造的，而是人类污染环境的间接结果，由此判断选C。Ⅲ.21.development/change 提炼概括题。纵观全文，主要讨论美国家庭结构的变化，故此得出答案。22.smaller 提炼概括题。通过对第一段的理解，美国家庭过去与现在发生很大变化，因此与Inthepast,Americanfamiliestendedtobequitelarge相对应的就是现在美国家庭小了很多。23.Reasons 词形转换题。根据第二段中Onereasonforthisisanincreaseinthecostofliving.及其后面内容的叙述，可以得出答案。24.longer 25.entertainment 26.responsible 词性转换题。根据第二段中Theparentsusuallytaketheresponsibilityforalltheexpenses.一句可以得出答案。27.divorce/separation 28.settled/safe 9\n29.busy 30.importance/value9
