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1、Unit4Astronomy:thescienceofthestars第二部分：英语知识运用（共两节，满分45分）第一节：语法填空（共10小题；每小题1・5分，满分15分）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号屮词语的正确形式填空。Sincepeoplefirstsentrocketsintospaceinthe1950s,wehavebeenleavingbehindallsortsofthings.Someofthem,likethecameras,21.
2、（lose）byastronautswhentheydidworkoutsidetheirspaceship.Butmuchofthespacejunkismadeupoflittlepiecesofthings22.wereoncebiggerobjects,untiltheystruckeachotherandbrokeapart.Somethingswesendintospacefallbacktowardtheearthandburnupintheatmosphere.23.largerpiecess
3、ometimessurvivetheextremeheatandhitthegroundortheocean24.greatspeeds.Sothereisalwaysconcernthatsomethingmayfallfromtheskyandwillbe25.（harm）tous.Butspacejunk26.（fall）onhousetops（屋顶）isnotthebiggestworry.Scientistsareconcernedaboutwhatwillhappenwhen27.emptyroc
4、ketstrikesanotherwhileorbiting（绕……运彳亍）theearth・Twobigthingsbecomemanysmallerthings.Theythenhit28.things.Thepiecesgetsmallerandsmalleruntil29.formacloudofjunkthatblocksthepathoffuturespacevehicles.Sowhatcanbedonetocleanupthespacearoundourplanet?Scientistshav
5、ebeenworried30.thespacejunkformanyyears.Rightnow,thecostsoftheclean・uphavebeentoogreat.第二节：完形填空（共20小题；每小题1・5分，满分30分）阅读下而短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空片处的最佳选项。"Areyouauditioning（试音）'Melody?"Ebonyasked,lookingupattheposter."Girl,Iwillnotbetryingout,"saidM
6、elody.ItwasMelody's31toperformonstage・However,asad32alwayspreventedthissongbirdfromrealizingherdream.Sometimeago,shereceivedthe33ofherlifewhenaskedtoperformataconcertheldbyher34•Onstage,shestoodstraightandstiff（僵硬地）'35tolookintoanyone'seyes.Whenshe36openedh
7、ermouthtosing,almosteverynotewasoff-key.Aftersucha37displayMelodydecidedshewouldnever38onstageeveragain.Yet,severalweekshadpassedandMelody'smindlivedontheupcomingauditions.She39towritehernamedownonthelistbutunfortunatelyshewas40filledwithfearandanxiety.Then
8、extdayatschool,shewenttotheschoolhalltowatchthestudents41•Suddenly,MelodyheardBlainecallhername.z/ljustwantedtowishyouallthebestinyouraudition/'Melodystartedtolaugh,42himthatshedidn'twriteher43down."Me
