2015-2016学年高中英语 unit 4 astronomy the science of the stars partⅰwarming up & reading双基限时练 新人教版必修3

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1、双基限时练Unit4　PartⅠⅠ.单句语法填空1.In2015,a________(violence)explosionhappenedinTianjin.答案　violent2.Formingagoodhabitofstudyingisfundamental________one'sachievementsintheyearstocome.答案　to3.Nowwestilldon'tknowwhetherlife________(exist)onMars.答案　exists4．Weusuallyt

2、aketurns________(do)cleaning,andtodayitismyturn________(do)it.答案　todo;todo5．Thereisa________(puzzle)lookonherface.Actually,shefelt________(puzzle)aboutallofthis.答案　puzzled;puzzled6．________Alicewillbeabletogethelpfortherescueisnotcertainyet.答案　Whether7．

3、Shemade________herdutytolookaftertheoldwomaninhersparetime.答案　it8．Cindydidn'tleavetheofficelastnight________shefinishedherjob.答案　until9．Althoughthetrafficwasheavy,Imanagedtobe________timefortheimportantlecture.答案　in10．Itis________(unlike)thathewillcomet

4、ohelpsoonbecausehehasjustgoneout.答案　unlikelyⅡ.阅读理解AEdmundHalleywasanEnglishscientistwholivedover200yearsago.Hestudiedtheobservationsofcomets(彗星)whichotherscientistshadmade.Theorbitofoneparticularcometwasaverydifficultmathematicalproblem.Hecouldnotfigure

5、itout.Neithercouldotherscientistswhodealtwithsuchproblem.However,HalleyhadafriendnamedIsaacNewton,whowasabrilliantmathematician.Newtonthoughthehadalreadyworkedoutthatproblem,buthecouldnotfindthepapersonwhichhehaddoneit.HetoldHalleythattheorbitofacometha

6、dtheshapeofanellipse(椭圆形)．NowHalleysettowork.Hefiguredout(计算出)theorbitsofsomeofthecometsthathadbeenobservedbyscientists.Hemadeasurprisingdiscovery.Thecometsthathadappearedintheyears1531,1607,and1682allhadthesameorbit.Yettheirappearanceshadbeen75to76year

7、sapart.ThisseemedverystrangetoHalley.Threedifferentcometsfollowedthesameorbit.ThemoreHalleythoughtaboutit,themorehethoughtthattherehadnotbeenthreedifferentcomets,aspeoplethought.Hedecidedthattheyhadsimplyseenthesamecometthreetimes.Thecomethadgoneawayand

8、hadcomebackagain.Itwasanastonishingidea!Halleyfeltcertainenoughtomakeaprediction(预言)ofwhatwouldhappeninthefuture.Hedecidedthatthiscometwouldappearintheyear1758.Therewere53yearstogobeforeHalley'spredictioncouldbetested.In1758theco