Unit2ChallengingYourselfI课时训练高中英语选修7电子题库

Ⅰ.单项填空1．Itmatterslittle_________amandies，but________mattersmuchis_______helives.A．how；what；howB．how；it；howC．why；it；whyD．that；what；that解析：选A。第一个空用how引导主语从句，it在句中作形式主语；第二空用what引导主语从句，what在从句中作主语，第三空用how引导表语从句。2．_________fromspace，theearth，withwater________seventypercentofitssurface，looksa“blueball”．A．Seen；coveredB．Seeing；coveringC．Seeing；coveredD．Seen；covering解析：选D。句意：从太空中看，被水覆盖了百分之七十的地球，看起来像是一个蓝色的球。seen是过去分词作条件状语，与主语earth是被动关系。第二个空用covering，因为cover与water是主动关系。3．Iwas________whenIsawthenastygashinherarm.A．frightenB．frighteningC．frightenedD．fright解析：选C。句意：她胳膊上又深又长的大伤口吓坏了我。frighten作动词表示“使害怕”，此处用被动语态的形式。4．—Haveyou________somenewideas?—Yeah.I’lltellyoulater.A．comeaboutB．comeintoC．comeupwithD．comeoutwith解析：选C。comeabout发生；comeinto形成；comeupwith想出；赶上，根据句子中后面的“新的观点”可知选C。5．Believeitornot，Levy’ssistersuddenly_________tearswhenwewereeating.A．burstoutB．burstinC．burstintoD．burston解析：选C。句意为：不管你信不信，Levy的妹妹在吃饭时突然大哭。burstintotears＝burstoutcrying放声大哭。6．Itwascruel________.A．ofJimtoshootatthebirdB．forJimtoshootatthebirdC．toshootthebirdofJimD．ofJimtoshootthebird解析：选D。句意为：基姆射死小鸟很残忍。shootatsth.向某物射击；shootsth.击中，射中，根据句意可排除A、B项。itis...ofsb.todosth.是固定句型。7．—Haveyoutoldthenewstohim?—Notyet.Hislineisbusy.Ican’t________.A．getthroughB．ringbackC．putdownD．holdon解析：选A。getthrough接通；ringback回电话；putdown放下；holdon坚持，根据句中提到的“线路正忙”可知选A。8．Howdidit________thathumansspeaksomanydifferentlanguages?A．comeoutB．comeoffC．comeaboutD．comeround解析：选C。comeout出版；comeoff离开，实现；comeabout发生；comeround苏醒。根据句意可知是询问“如何发生”，因此选C。Ⅱ.阅读理解课时训练AEuropeansshouldtrytostayindoorsifashfromIceland’svolcanostartssettling，theWorldHealthOrganizationwarnedFridayassmallamountsfellinIceland，ScotlandandNorway.WHOspokesmanDanielEpsteinsaidthemicroscopic(微小的)ashispotentiallydangerousforpeoplewhenitstartstoreachtheEarthbecauseinhaled(吸入)particlescanenterthelungsandcauserespiratoryproblems.AndhealsosaidEuropeanswhogooutsidemightwanttoconsiderwearingamask.Otherexperts，however，weren’tconvincedthevolcanicashwouldhaveamajoreffectonpeoples’healthandsaidWHO’swarningswere“hysterical.”Theysaidvolcanicashwasmuchlessdangerousthancigarettesmokeorpollution.Volcanicashismadeoffineparticlesoffragmentedvolcanicrock.Itislightgraytoblackandcanbeasfineastalcumpowder.Duringavolcaniceruption，theashcanbebreatheddeepintothelungsandcauseirritationeveninhealthypeople.Butonceitfallsfromagreaterdistance—likefromthecloudcurrentlyhoveringaboveEurope—itshealtheffectsareoftenminimal，expertssay.“Notallparticlesarecreatedequal，”saidKenDonaldson，aprofessorofrespiratorytoxicologyattheUniversityofEdinburgh，“Inthegreatschemeofthings，volcanicashisnotallthatharmful.”AndhesaidmostEuropeans’exposuretovolcanicashwouldbenegligibleandthatonlythoseinthenearvicinityoftheIcelandicvolcanowouldlikelybeatrisk.Dr.StephenSpiro，aprofessorofrespiratorymedicineanddeputychairoftheBritishLungFoundation，saidthefurthertheparticlestravel，themoredilutedandlessdangeroustheywillbe.“ThecloudhasalreadypassedovernorthernScotlandandwehaven’theardofanyilleffectsthere，”hesaid.Spirosaidtowearmasksorstayindoorstoavoidvolcanicashwas“overthetop”and“abithysterical.”1．Thetextismainlyabout________.A．theeffectofvolcanicashB．thehealthriskofvolcanicashC．thedisadvantagesofvolcanicashD．theopinionsonhealthriskofvolcanicash解析：选D。主旨大意题。本文主要就火山灰对人的健康的危害问题世卫组织和其他专家给出不同观点做了陈述。A太笼统；B不能体现不同的观点；C与文章内容无关；D符合题意。2．WhichoneisTRUEaccordingtoParagraph3?A．Thevolcanicash’seffectsonEuropeanswerelittle.B．Theashcausedirritationeveninhealthypeople.C．OtherexpertsthoughtWTO’Swarningswereuseful.D．Thevolcanicashwasmoredangerousthancigarettesmokeorpollution.解析：选A。细节理解题。第三段最后一句可知A是正确的；由第三段中Duringavolcaniceruption...inhealthypeople.可知B错误；由第三段中Otherexperts，however，weren’tconvinced...cigarettesmokeorpollution.可排除C、D。3．Theunderlinedword“hysterical”inParagraph3mostprobablymeans_________.A．amazingB．practicalC．valuableD．overstated解析：选D。词义猜测题。由上文中Volcanicashisnotallthatharmful和下文中．..onlythoseinthenearvicinityoftheIcelandicvolcanowouldlikelybeatrisk.可知D正确，夸大的，言过其实的。4．Whatcanwelearnfromthepassage?A．Thevolcanicashwouldn’tbeharmfultopeople.B．Allexpertsthoughtthevolcanicashdidgreatharmtoourhealth.C．Peopleclosetothevolcanowouldlikelybeatriskaccordingtosomeexperts.D．EuropeansshouldstayindoorsbecauseIceland’svolcanostartssettling.解析：选C。由第三段Butonceitfallsfromagreaterdistance...effectsareoftenminimal...和第四段中．..onlythoseinthenearvicinityoftheIcelandicvolcanowouldlikelybeatrisk.以及第五段中thefurthertheparticlestravel，themoredilutedandlessdangeroustheywillbe可知C正确。A、B、D观点表达绝对。BThevolcanoisoneofthemostsurprisingfrighteningthingsofnature.Maybeyouhaveseenpicturesofthese“fireworks”ofnature.Sometimeswhenavolcanoerupts，averylargewallofmeltedrockmovesdownthesideofamountain.Itlookslikea“riveroffire”．Sometimesvolcanoesexplode，throwingthemeltedrockandasheshighintotheair.Butwheredoesthismeltedrockcomefrom?Theearthismadeupofmanylayers(层)．Thetoplayerthatweseeiscalledthecrust.Underthecrustaremanylayersofhardrock.Butfar，farbeneaththecrusttherockissohotthatitissoft.Insomeplacesitevenmelts.Themeltedrockiscalledmagma.Sometimesthemagmabreaksoutto