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11.-SorryI'mlate.-_______A.Youarewelcome.B.It'sapleasure.C.Takecare.D.Don'tworry.D2.-Wearegoingtohaveasingingpartytonight.Wouldyouliketojoinus?-_______A.I'mafraidnot,becauseIhavetogotoanimportantmeeting.B.Ofcoursenot.Ihavenoidea.C.No,Ican't.D.That'sallset.A3.-Wouldyouliketogototheconcertwithusthisevening?-________A.No,Ialreadyhaveplans.B.I'dloveto,butI'mbusytonight.C.No,Ireallydon'tlikebeingwithyou.D.I'mill,soIshouldn'tgoout.B4.-MustItakeataxi?-No,you________.Youcantakemycar.A.hadbettertoB.don'tC.mustnotD.don'thavetoD5.-CouldIspeaktoDonWatkins,please-________A.Speaking,please.B.Oh,howareyouC.I'mlistening.D.I'mDon.A2Thewordhorsepowerwasfirstusedtwohundredyearsago.(200)JamesWatthadmadethefirstwidelyusedsteamengine.Hehadnowayoftellingpeopleexactlyhowpowerfulitwas,foratthattimetherewerenounitsformeasuringpower.Wattdecidedtofindouthowmuchworkonestronghorsecoulddoinoneminute.Hecalledthatunitonehorsepower.Withthisunithecouldmeasuretheworkhissteamenginecoulddo.Hediscoveredthatahorsecouldlifta3,300-poundweight10feetintotheairinoneminute.Hisenginecouldlifta3,300-poundweight100feetinoneminute.Becausehisenginedidtentimesasmuchworkasthehorse,Wattcalleditatenhorsepowerengine.6.ThepassagesaysthatWattmadethefirstwidelyusedsteamengine.A.TB.FA7.Wattmadeupaunitofmeasurementbasedonthestrengthofahorse.A.TB.FA8.Wattwantedtofindawaytolifta3300-poundweight.A.TB.FB9.Onehorsepowerwouldequaltheweightahorsecouldlift.A.TB.FB10.ThetitleofthepassageisHowtheTermHorsepowerCameintoBeing.A.TB.FAWhatmakesapersonascientist?()Doeshehavewaysortoolsoflearningthataredifferentfromthoseofothers?Theanswerisno.Itisnotthetoolsascientistusesbuthowheusesthesetoolsthatmakeshimascientist.Youwillprobablyagreethatknowinghowtouseapowerisimportanttoacarpenter.Youwillprobablyagree,too,thatknowinghowtoinvestigate,howtodiscoverinformation,isimportanttoeveryone.Thescientist,however,goesonestepfurther,hemustbesurethathehasareasonableanswertohisquestionsandthathisanswercanbeconfirmedbyotherpersons.Healsoworkstofittheanswershegetstomanyquestionsintoalarge3setofideasabouthowtheworldworks.Thescientistsknowledgemustbeexact.Thereisnoroomforhalfrightorrightjusthalfthetime.Hemustbeasnearlyrightastheconditionspermit.Whatworksunderonesetofconditionsatonetimemustworkunderthesameconditionsatothertimes.Iftheconditionsaredifferent,anychangesthescientistobservesinademonstrationmustbeexplainedbythechangesintheconditions.Thisisonereasonthatinvestigationsareimportantinscience.AlbertEinstein,whodevelopedtheTheoryofRelativity,arrivedatthistheorythroughmathematics.Theaccuracyofhismathematicswaslatertestedthroughinvestigations,andEinsteinsideaswereshowntobecorrect.Ascientistusesmanytoolsformeasurements.Thenthemeasurementsareusedtomakemathematicalcalculationsthatmaytesthisinvestigations.11.Whatmakesascientistaccordingtothepassage?________A.Thetoolsheuses.B.Thewayheuseshistools.C.Hiswaysoflearning.D.Thevarioustoolsheuses.B12.Theunderlinedpartinthepassageshows_______.A.theimportanceofinformationB.theimportanceofthinkingC.thedifferencebetweenscientistsandordinarypeopleD.thedifferencebetweencarpentersandpeoplewithotherjobsC13.Asoundscientifictheoryshouldbeonethat_________.A.worksnotonlyunderonesetofconditionsatonetime,butalsounderthesameconditionsatothertimesB.doesnotallowanychangesevenunderdifferentconditionsC.canbeusedformanypurposesD.leavesnoroomforimprovementA14.TheauthorquotesthecaseofAlbertEinsteintoillustrate__________.A.thatmeasurementsarekeystosuccessinscienceB.thataccuracyofmathematicsC.thatinvestigationsareimportantinscienceD.thatthemathematicalcalculationsmaytesthisinvestigationsC15.Whatisthemainideaofthepassage?________A.Thetheoryofrelativity.4B.Exactnessisthecoreofscience.C.Scientistsaredifferentfromordinarypeople.D.Exactnessandwaysofusingtoolsarethekeystothemakingofascientist.D16.WhenLaurafinallyarrivedsheapologized_______solate.A.fortocomeB.thatshewascomingC.forcomingD.tocomeC17.SamuelClemens,________asMarkTwain,wasoneofthemostfamousAmericanwriters.A.toknowB.tobeknownC.knownD.knowingC18.Sheisnotonlymyclassmate________alsomygoodfriend.A.orB.butC.andD.tooB19.Tomissotalkative.I'msureyou'llsoongettired_______him.A.ofB.withC.atD.onA20.He_______livesinthehousewherehewasborn.A.alreadyB.yetC.stillD.everCSusanClevelandistheyoungpresidentofacandycompanyinthecityofChicago.()Herfatherbeganthecompanyinthe1960's.Hediedthreeyearsago.Now,thecompanybelongstoSusan.Susan,however,didnothaveanyjobsbeforebecomingheadofthecompany.Shejustfinishedthecollege.TheemployeesbecameevenmoreconcernedduringSusan'sfirstmonthsonthejob.Mr.Clevelandhadbeena__21__leader.ButSusanpermittedmanyemployeestomaketheirown__22__.5Oneemployeesaid,OldMr.Clevelandalwaystolduswhattodo.Hekeptpeopleonashortleash.Butthecompanydidwell.WhatdoesashortleashmeanAleashisakindofrope.Weusealeashtowalkourpetdogs.Theleashkeepsthedogfrom__23__awayorgettingintotrouble.Keepingapersononashortleashmeanskeepinghimorherunderclosecontrol.Thepersoncan'tmakemanydecisionsforhimselforherself.Ms.Clevelanddoesnotkeepherworkersonashortleash.__24__,sheenc