搜索
K12最新资料Module4单元练习题单项选择1.Hewas______tired_____hefellasleepassoonashelaydownA.too;toB.so;thatC.enough;toD.such;that2.Mygrandmadidn’tgotosleep_________IgotbackhomeA.whereB.untilC.assoonasD.while3.______LeiFengisnolongerliving,hisspiritlivesontoday.A.IfB.WhenC.AlthoughD.Because4.Hewas____angrytohearthenewsthathecouldn’tsayaword.A.soB.tooC.veryD.somuch5.Sallydidit______Kyliecouldavoidproblemwithherparent.A.becauseB.sothatC.suchthatD.as6.---I’msorryyoucan’tcomewithus,Betty---__________.A.SodoIB.SoamIC.SocanID.SowillI7.We_____allpassengersforTrainT27toLhasa_______immediatelytoPlatform2A.advise;togoB.advise;goC.order;goD.make;togo8.Therewon’tbe____towakeyouupinthemorning.A.somebodyB.nobodyC.everybodyD.anybody9.Icanlookaftermyself,_____itwon’tbeeasyforme.A.butB.becauseC.althoughD.so10.---that’smytrain!ButIhaven’tgivenyououraddressinLhasa---Sendmeatextmessage._____!A.IwillcallyouB.HaveagoodtripK12最新资料C.HereyouareD.Haveagoodsleep11.Tony’sdogwasmissing.But_____weekslateritcamebackbyitself.A.alittleB.littleC.fewD.acoupleof12IbecamesoboredwiththeirordersthatIwishedtheywould__me__.A.leave;aloneB.left;lonelyC.leave;lonelyD.leaf;alone13.Well,mywish_____!HowhappyIwas.A.cameoutB.cometrueC.cametrueD.camein14.Whenmyparentscamehome,they____findthatIcouldcookandtidyupnow.A.werehappytoB.areluckytoC.werehappyD.arelucky15.Ifoundmyselfsobad____simplecookingtasksA.inB.onC.atD.about阅读理解ADidyouwatchthe2012LondonOlympicGames?Ifyoudid,youmustknowapersonwhochangedmen'sswimminghistoryofChinaandsetanewworldrecordforus.Yes,that'sSunYangwhogaveuslotsofsurprisebywinningtwoOlympicgoldmedalsinswimming.SunYangbecamethefirstChinesemaleswimmertoearnagoldmedalashewonthe400mfreestylewithanOlympicrecordinLondononJuly28th,2012.ItisthefirstgoldmedalthataChineseswimmerhaseverwonintheOlympichistory.AlloftheChineseareproudofhim.HeistheheroofthewholeChina.K12最新资料SunYangwasbornonDecember1st,1991inZhejiang.Heis198cmtalland89kginweight.SunYang'shobbiesaresingingandreading.SunYanglovedsportswhenhewasveryyoung.Hekepttraininghardeverydayandthatiswhyhehasmadesuchgreatachievements.NownearlyeveryChineseknowshim.Whenhegoesanywhere,hemustbefollowedbyhisfans,whichmakeshislifelessconvenientanddifficult,butheisveryrich.Sodoyouwanttobeapersonlikehim?16.WhereweretheOlympicGamesheldin2012?A.London.B.Beijing.C.Athens.D.Sydney.17.HowmanygoldmedalsdidSunYangwin?A.One.B.Two.C.Three.D.Four.18.WhatdoesSunYangprobablydoinhisfreetime?A.Swimmingandrunning.B.Singingandreading.C.Playingchessandskating.D.Playingfootballandbasketball.BYouhavelearnedaboutenergy.DoyouknowthatHEATisaformofENERGY?Yep,thisformofenergyactsoneverything.And,we’regoingtolookatafewexperimentstolearnhowthisformofenergyactsandwhyweneedtoknowallaboutit.Theheatenergyofsomethingisdecidedbyhowactiveitsatoms(原子)andmolecules(分子)are.Ahotobjectisonewhoseatomsandmoleculesareexcitedandshowrapidmovement.Acoolerobject’smoleculesandatomswillbelessexcitedandshowlessmovement.Whentheseguysareintheexcitedstate,theytakeupalotofspacebecausethey’removingaroundsofast.Whentheatomsandmoleculessettledown,orcooldown,theytakeuplessspace.IfaHOThigh-energyatomcomesintocontactwithacoollow-energyatom,theexcitedatomK12最新资料willloosesomeofitsenergytothecoolatom.Thetwoatomswillreachanenergylevelthat’sbetweenwheretheyeachstartedout.ThatleveliscalledThermalEquilibrium.Experiment:Ifyouhaveacupofreallyhotchocolateandwanttocoolitdown,youmayputanicecubeinthecup.Aftertheicehascompletelymelted(disappeared),thehotchocolateandthemeltedicehavecometoThermalEquilibrium.Nowthatyouhaveanideaofwhatheatis,let’slookatsomeoftheeffectsofthisformofenergy.Here’sanotherexperiment.Blowupaballoon,butnotalltheway.Puttheballooninarefrigeratorforaboutanhour,thentakeitout.Diditbecomesmaller?Why?Itbecamesmallerbecausetheairmoleculesinsidetheballoonsloweddownandaretakinguplessspace.Nowputtheballoonindirectsunlight.Whathappenedafteritwarmedup?Why?Fromtheaboveexperiment,welearnedaveryimportantfact—heatcausesthingsto“grow”.WecallthisThermalExpansion.Ifthings“grow”whenheated,whatdoyouthinkhappenstothemwhentheygetcold?Ifyougetachancetocheckoutsomerailroadtracks,noticethegapsorseparationsbetweentherails.(Don’tgetrunoverbyatrain!)Thermalexpansionandcontractioniswhythosegapsareplacedtherethatway,andwhyexpansionjointsareplacedinlonghighwaybridges.You’veprobablyfeltexpansionjointsonoldconcretehighways.Rememberthe“thump–thump”soundasyourodeoverthem?19.Howmanyexperimentsarementionedinthepassage?A.Two.B.Three.C.Four.D.Five.20.WhatisThermalEquilibrium?A.Thefactthathotatomsloosesomeenergytocoolatomswhentheymeet.B.Thefactthattherearealwaysthegapsorseparationsbetweentherails.K12最新资料C.Thefactthatheatcausesthingstoincreaseinsize.D.Thefactthatheatisanotherformofenergy.21.Whyisthefirstparagraphwritten?A.Toexplainwhatheatenergyis.B.Tosortenergyformsforreaders.C.Togiveexamplesofheatenergy.D.Totellreaderswhattoreadhere.22.Whatisthelastparagraphmainlyabout?A.Whythermalexpansionisonthetracksandhighways.B.Howtocheckrailroadtracksandconcretehighways.C.Whyrailroadsandhighwaysarebuiltthatway.D.Howtoremembert