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课时提能练21-22课时提能练(二十一)Book4Unit2Sportsevents课时作业A：基础层面Ⅰ.单句语法填空1．Theyfoundthemselvescompetingwith/againstforeigncompaniesforashareofthemarket.2．WevisitedHuangshanwithalocalmanleading(lead)theway.3．Ihadabadcold，otherwiseIwould_have_visited(visit)youlastweek.4．Onmywayhome，Isawamiddleagedmanlyingbytheroadside，obviouslydrunk(drink)．5．Twofactorieswereclosedinanattemptto_protect(protect)theenvironment.Ⅱ.语境语法填空TheOlympicGames1.are_held(hold)everyfouryears.TheancientOlympicGamesbeganaroundtheyear776BCinGreece.Atthattimetheyoungmencompeted2.inrunning，jumpingand3.wrestling(wrestle)．Butwomenwerenotallowed4.to_take(take)partinthegamesin5.thepast.TheoldOlympicGamesstoppedafterabouttheyearAD394.However，thefirstOlympicGamesinmoderntimes6.happened(happen)intheyear1896.ThatwasaFrenchman，PierredeCoubertin，7.whobroughttheOlympicsbacktolife.HedreamtthattheOlympicswouldmake8.itpossibleforpeopleofallcountriestolivesidebysideinpeace.TheOlympicmottois“Faster，Higher，Stronger”．Itmeansthateveryathleteshouldtrytorunfaster，jumphigher，andthrow9.farther(far)．The2008OlympicGameswereheldinBeijing，anditwasthefirsttimethattheChinese10.athletes(athlete)hadwonthemostgoldmedals.Ⅲ.完成句子1．她的梦想是参加奥运会比赛。Herdreamwasto_compete_intheOlympics.2．汤姆不在期间将由我负责这个班。Iwillbeinchargeoftheclassin_Tom's_absence.3．穿上外套，不然你会感冒的。Putyourcoaton，otherwise_you'll_catch_a_cold.4．迄今为止，研究尚未产生任何具有重大意义的结果。Sofar，theresearchhasn'tproducedanythingof_great_significance.5．让我们感到宽慰的是，那个迷路的小孩十天后返回了家里，疲惫不堪却很健康。Toourrelief，themissingchildreturnedhometendayslater，tired_but_healthy.课时作业B：能力层面Ⅰ.阅读理解A(2019·郑州市第一次质量预测)Ifyou'veeverhadadog，youknowjusthowdeepaconnectionyoucandevelopwith“man'sbestfriend”．Butadog'slifeismuchshorterthanhumans，about12to15yearslong，whichmeanseverydogownerhastogothroughtheheartbreakingmomentwhentheirlovingpetpassesaway.Whynotmakeacloneofthatdogthen?ThisisthesolutionofferedbyaSouthKoreancompany，SooamBiotechResearchFoundation.Thecompanyhasalreadysuccessfullyclonedatleast400dogs，mostlyforUScustomers，eversinceitpioneeredthetechniquein2005.Now，SooamBiotechhasintroduceditsbusinesstoUKdogownersaswell，offeringthemdogsthatlookjustliketheirlostones.Tocloneadog，researchersfirstneedtotakeaskincellfromalivingdogoronethathasjustdied.Meanwhile，anotherdogisselectedtosupplyanegg.ResearchersthenreplacetheDNAintheeggwiththatfromtheskincellandimplanttheeggintothewomb(子宫)ofafemaledog.Theegggrowsintoapuppyoverthefollowingtwomonths.Thewholeprocesstakeslessthanaday，butitcomesatashockinglyhighprice—around￡63,000.Butifyoucan'tafforditnow，youcanalsosavethecellinalaboratoryandaccessitatalaterdate.However，magicalascloningmightsound，thereisnoguaranteethatthecloneddogwillbeaperfectcopyoftheoriginalone.Justlikeidenticaltwinsofhumans，theysharetheexactlysameDNAbuttherewillstillbesmalldifferencesbetweenthem.“ThespotsonaDalmatian(斑点狗)clonewillbedifferent，forexample，”InsungHwang，headofSooamBiotech，toldTheGuardian.Dogownerswillalsohavetoacceptthefactthatpersonalityisnot“cloneable”．Apartfromgenes，personalityisalsodeterminedbyupbringingandenvironment，whicharebothrandomelementsthatcloningtechnologiessimplycannotovercome，ProfessorTomKirkwoodatNewcastleUniversity，UK，toldTheTelegraph.Perhapsbringingourdogsbackbycloningisnotthebestwaytorememberthemafterall.Kirkwood，adogownerhimself，pointedout，“Animportantaspectofourrelationshipwiththemiscomingtotermswiththepainoflettinggo.”【语篇解读】本文主要介绍了克隆狗技术。1．WhatservicedoesSooamBiotechResearchFoundationoffer?A．Makingcopiesofpetdogs.B．Givingpetdogsidenticaltwins.C．Helpingdogsgivebirthtomorepuppies.D．Helpingdogownerslovetheirdogsmore.A[细节理解题。根据第二段最后一句“Now，SooamBiotechhasintroduceditsbusinesstoUKdogownersaswell，offeringthemdogsthatlookjustliketheirlostones”可知，这家公司所提供的服务就是克隆已逝的宠物狗，故选A。]2．Whichorderiscorrectinthedogcloningprocess?a．Aneggistakenfromanotherdog.b．Askincellistakenfromthepetdog.c．Theegggrowsintoapuppyintwomonths.d．Theeggisplacedinthewombofafemaledog.e．TheDNAintheeggisreplacedbytheDNAfromtheskincell.A．a→d→b→e→cB．a→e→b→d→cC．b→a→d→e→cD．b→a→e→d→cD[细节理解题。根据对第三段的整体理解可知，实验的第一步是从狗身上提取皮肤细胞，另一只被选择的狗提供一个卵子，将卵子中的DNA替换成皮肤细胞中的DNA之后，将卵子植入一只母狗的子宫，最后卵子在接下来的两个月中生长为一只小狗，故选D。]3．Whatcanwelearnaboutdogcloningfromthepassage?A．Ithasnotbeenputintopracticeuntilrecently.B．ItisverypopularamongUSandUKpetowners.C．Itmightnotgivetheownersanexactlysamedog.D．Itisveryexpensiveandusuallytakeshalfayeartocomplete.C[细节理解题。根据第五段第一句“However，magicalascloningmightsound，thereisnoguaranteethatthecloneddogwillbeaperfectcopyoftheoriginalone”可知，克隆狗和原来的狗可能并非完全一样，故选C。]4．WhatdoesKirkwoodthinkofdogcloning?A．Hedisagreeswithit.B．Hesupportsit.C．Heiscuriousaboutit.D．Hethinksitunbelievable.A[观点态度题。根据最后一段Kirkwood说的话“Animportantaspectofourrelationshipwiththemiscomingtotermswiththepainoflettinggo”可知，他认为人类和宠物狗之间的关系的一个重要方面是要接受失去它们的痛苦；由此可推知，Kirkwood并不赞成克隆狗，故选A。]B(2019·惠州市第二次调研)Doyoufinditdifficulttoputdownyourmobilephone?Ifyes，you'renotalone.Thesedays，manypeoplesufferfromthestressofFOMO(fearofmissingout)．Theyreachfortheirmobilephoneswhentheywakeupinthemorning，andfortherestoftheday，theyconstantlyscrolldownthetimelinesoftheirsocialme