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一、词汇与语法选择（20小题，每小题0.5分。共10分，建议时间10分钟）21._________foryourencouragement,I'dneverhaveinventedthismachine要不是你的鼓励,我根本不能发明这台机器A.HaditnotB.IfitwerenotC.IfIhadnotbeenD.Haditnotbeen要不是22.Ifwecan______ourpresentdifficulties,everythingwillbeallright.如果我们能解决我们目前的困难,一切都会好的。A.getoff下来B:getacross通过C.getover克服D.getthrough完成23.Allbuses________becauseoftheheavysnow,theyhadtogothereonfoot。因为大雪所有的公交车已经被取消,他们不得不走路去那里。A.hadbeencanceled已撤销B.havingbeencanceled被取消C.werecanceled取消D.havingcanceled撤销24.Inourapartment,therearefiverooms,_______isusedasaliving-room.在我们的公寓里,有五个房间,其中最大的是当一个起居室A.thelargestofthemB.thelargestofwhatC.thelargestofwhich最大的房间D.thelargestofthat25.It'shighlynecessarythattherocket________untilallthepreparationshavebeenmade.,直到所有的准备工作做好，这是非常必要的,否则火箭无法发射。A.isnottobelaunchedBnotbelaunched不能被发射C.werenotlaunched不发射Dwaslaunched发射26.Meltedironispouredintothemixermuch______fromateapot.融化的铁倒入搅拌机就像同样的方式倒入茶壶。A.inthesamewaylikeB.inthesamewaywhichC.inthesamewaythatD.inthesamewayas以同样的方式27.Oil,_____thereareseveraldifferenttypes,isusedformanypurposesbycountriesallovertheworld.几种不同的类型的油，被世界各地国家用于多种用途。A.atwhichB.inwhichC.bywhich.D.ofwhich28.Itseemstobehightimethatthisargument_____puttoanend。争论到高潮的时候，就结束了。A.mustbeB.isC.wereD.shouldbe29.Thecomputerhasbroughtaboutsurprisingtechnologicalchanges_____weproduceandorganizeinformation.计算机在生产方式和组织信息方面已经带来了令人惊讶的技术变革。A.inaway在某种程度上B.intheway在这方面C.inthatway那样D.innoway绝不30．____secondthoughtsthey'vedecidedtogiveupthepurchaseofthenewassemblyline.转念一想,他们决定放弃购买新的装配线。A.On【Onsecondthoughts再三考虑的】B.WithC.AtD.But31.Solittle_______aboutmathematicsthatthelecturewascompletelybeyondme.我确实还不太了解数学,这完全超出了我的讲座。A.IknowB.IknewC.doIknowD.didlknow32._______withthesizeofthewholeearthhigh.thehighestmountaindoesnotseematall.当与整个地球的大小。似乎并没有在所有最高的山峰。A.Whencompared比较B.CompareC.WhilecomparingD.Comparing33.We'llattendaninternationalconferenceheldinParis_______wehaveenoughtime.只要我们有足够的时间，我们将参加在巴黎举行的一个国际会议。A.provided假如B.unless除非C.until直到D.lest唯恐34.Themanagerwantstoknowwhetherthemeasureshavebeenagreed_________。经理想知道是否已达成一致的措施。A.toB.withC.overD.Upon35.Wemakesomerubberfrompetroleum,but______rubbercomesfromtreesinSoutheastAsia.我们从石油制作一些橡胶,但天然橡胶来源于东南亚的树木。A.realB.genuine真正的C.artificial人造的D.natural36.Electricalenergyiscollectedintheatmosphereaswateriscollectedand_______inadam【水坝】。大气里的电能量被收集，就像水被收集并存储在一个大坝一样。A.produced产生B.stored储存.C.profited盈利.D.paid支出37.Researchfindingsshowwespendabouttwohoursdreamingeverynight,nomatterwhatwe_______duringtheday.研究结果显示，每天晚上我们大约要花两个小时做梦,无论在白天我们做过什么。A.musthavedone一定是B.wouldhavedone本来会C.shouldhavedone本应该D.mayhavedone过去做过38.Somecompaniesandfactoriesrelysoheavilyoncomputersthattherearemajorproblemswhentheircomputersystems_________。一些公司和工厂如此依赖电脑,他们的电脑系统发生故障导致发生重大的问题。A.breakoff中断B.breakup终止C.breakdown发生故障D.breakout突发39.Asweknow,theoxygencontentofMarsisnot_______tosupportlife.我们知道,火星的氧含量并不足以支持生命。A.sufficient足够的B.sufficientenoughC.enoughsufficientD.sosufficientenoughas40.________theearth,JohnGlennwasapioneerintheUSspaceprogram.美国第一个环绕地球飞行的人，约翰·格伦是美国太空计划的先驱。A.ThefirstAmericantoorbit第一个环绕地球飞行的美国人B.ThatthefirstAmericanorbitedC.HewasthefirstAmericantoorbitD.InspiteofthefirstAmericanwhoorbited41.RonaldReaganhadservedtwotermsasgovernorofCaliforniabefore______President.罗纳德·里根成为总统之前担任加州两届州长A.hebecameB.whenbecomingC.becameD.didhebecome.42.Nothingfurtherwasknownabouttheincident,butthecaptain_____thepassengersthatthecrewwouldbeconductingathoroughinvestigation.这件事情没有深入进展,但船长向乘客保证,工作人员会被进行一次彻底的调查。A.assured保证B.insuredC.assumedD.Ensured43.Theimportanceof_______designbecomesevidentwhenwerealizehowmuchtimewespendsurroundedbyfourwalls.室内设计的重要性就变得很明显,当我们意识到我们花很多时间被四面墙包围。A.internal内部的B.external外部的C.interior室内设计D.exterior外观44.Someofthemembersdemandedtoknowwhytheyhadbeenkeptin_____ofthetruefactsuntiltheyeachedthepresentcriticalstage.一些成员要求知道为什么他们一直保持不了解事实真相，直到他们达到目前的关键阶段。A.connection关系B.opposition反对C.preparation准备D.ignorance无知，不知道45.Tomaintainproductionlevels,wemust______anddeveloporacquirenewoilandgasreservestoreplacethosedepletedbyproduction.为了维持生产水平，我们必须找到并开发或收购新的石油和天然气储备，以取代那些枯竭产品。A.search搜寻B.examine检查C.identify识别D.locate查找46.Becauseof______diversity,sevenseparategroupingsordivisionsofalgaehavebeenestablishedbybotanists.因为他们的多样性,植物学家已制定了7个单独的分组或部门的藻类A.themB.sothatC.thoseD.Their47.________novameansnew,novasareactuallystarsthathaveexistedforalongtimeandsuddenlyflareintobrilliance.尽管“新星”意味着新的,新星实际上是恒星,已经存在了很长时间,突然发出耀眼的光芒。A.ThatB.WhyC.Although虽然D.Itis48.BecauseMarsisfartherfromtheSunthan__,Marstakeslongertocompletearevolution.因为火星离太阳比地球远，火星需要更长的时间围绕太阳旋转。A.EarthisB.isfromEarthC.whatisEarthD.isitEarth.49.Theportrayalofeverydaylifeintheobjectsoffolkartmakesit_____valuablesourceofhistory.民间艺术是对日常生活的写照，在对历史研究中提供了很有价值的信息。A.andaB.sothataC.AD.isa50_____bytheUnitedStatesgovernment'sBureauofLaborStatistics,theConsumerPriceIndexcomparescurrentcostsofgoodsandserviceswithpastcosts.消费物价指数由美国政府劳工统计局编制，比较货物和服务的现实成本与过去成本。A.ToprepareB.AsitpreparedD.Prepared单位C.Whenpreparation51.Asweneedplain,______foodforthebody,wemusthaveseriousreadingforthemind.因为