Unit3TheMillionPoundBankNoteⅠ.单项填空1．________isknowntoeverybody，themoontravelsaroundtheearthonceeverymonth.A．ItB．AsC．ThatD．What2．—IsMr.Smithrich?—Yes，veryrich.Whenheworkedin________town，heearnedalot.Nowhehasabigfarmin________country.A．a；theB．/；/C．/；theD．the；/3．WhilewatchingTitanic，mostpeoplecouldn’thelpcryingwhenitcametothescene________Jacksavesthegirl’slifebutdiesinicywaterhimself.A．whichB．asC．whyD．where4．—Comein，please.Makeyourselfathome.—________—I’mgladyoulikeit.A．Thanks.Youhaveaniceplacehere.B．Oh，thispictureissobeautiful.C．Thanks.Whatnicefoodyou’veprepared!D．OK.Letmelookaroundyournewhouse.5．Itissaidthattheprisonerswere________totaketwohours’exerciseaday.A．supposedB．permittedC．forbiddenD．persuaded6．WangWeigaveusavivid________ofhertripdowntheriver.A．explanationB．ideaC．imaginationD．account7．Heisaheavysmoker，whichmakesallofus________.A．comfortableB．illC．pleasantD．sick8．AprilFool’sDayiscoming.Becarefulnottobe________whenothersplaytricksonyou.A．broughtinB．caughtinC．takeninD．madein9．Wouldyouplease________thisformformetoseeifI’vefilleditinright？A．takeoffB．lookafterC．giveupD．goover10．—Ibelieveyoulikethejob.—________，Iamtiredofit.A．OnthecontraryB．OncontraryC．OntheotherhandD．Onotherhand11．________anyuntrainedactor，gettinginfrontofthecameracanbedifficult.A．AsfarasB．AswellasC．AslongasD．Aswith12．Isuddenlyfoundmyself________downthestreetwhenIfoundtwopolicemeninfrontofme.A．runB．runningC．runsD．ran13．________youprefer，I’llgiveittoyou，butwehaven’tanyothermodelsforyoutochoosefrom.A．WhateverB．WheneverC．HoweverD．Whichever14．Whytheexplosionoccurredwas________thelaboratoryattendanthadbeencareless.A．forB．becauseC．sinceD．that15．Excuseme，wouldyoupleasetellme________？A．whenthesportsmeetingistakenplaceB．whenisthesportsmeetinggoingtobeheldC．whenisthesportsmeetingtobeginD．whenthesportsmeetingistotakeplaceⅡ.阅读理解Ahugecloudofdustroseandanoverpassdisappeared.ThiswasthesceneinZhuzhou，HunanProvinceonMay17.Ninepeoplewerekilledand16injured.ThingsweresimilarlastyearintheSichuanearthquake.Thousandsofpeoplewereburiedintheruinsandlosttheirlives.Whatifwecouldhavewarnedthem?Peoplearealwaysracking_their_brainstofindawayofpreventingbuildings’collapse.Bettermaterialsandtechnologyhelp，buttheyarenotasolution.Justlikehumans，abuildinghasitsownlifecyclefrom“birth”to“death”．Ifweknowwhenabuildingisgoingtocollapse，wecanrepairitinadvanceorgetoutofitbeforeitfalls.Now，scientistsattheUniversityofIllinoishavedevelopedamaterialthatturnsredbeforeitbreaks.Theinventioncouldbeusedinthingslikeclimbingropesorbridgesupports.TheresearchwasledbyNancySottos，aprofessorattheuniversity’sBeckmanInstitute，andDouglasDavis，agraduateresearchassistant.Thesecretbehindthecolorchangingmaterialisatypeofmolecule(分子)．Amoleculeisagroupofatomsheldtogetherbychemicalbonds.Imagineyouandyourfriendsstandinginacircle，holdinghands.Eachpersonstandsforoneatom，yourhandsrepresentthebonds，andtheentirecirclerepresentsamolecule.Ifonepersonletsgoofhisorherhands，themoleculechangescolor.Theresearchteamputthemoleculeintoasoftmaterial.Whentheresearchersstretchedthematerial，itturnedbrightredforafewsecondsbeforeitbrokeintotwopieces.Whentheyrepeatedlystretchedandrelaxedthematerial，withoutbreakingit，itonlyturnedalittlered.Themajorprob...
