2018-2019学年高中英语 Unit 22 Environmental Protection Section Ⅴ 学业分层测评 北师大版选修8

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1、Unit22EnvironmentalProtectionSectionⅤⅠ.单句语法填空1．Notonly________Iknowher,butIwasherbestfriend.2．HesaidthattheChristmastree________(buy)soon.3．Youcaneasilygetaccess________thehumorousoldman.4．Hefixedhisattentionon________(listen)tothemorningnews.5．Atnotim

2、e________thecountrybeenmoreprosperousthanatpresent.【答案】　1.did　2.wouldbebought　3.to4．listening　5.hasⅡ.单句改错1．Thenaughtyboywasmadedohishomework._________________________________________________________________2．Notonlythestudentsbutalsotheteacherlikeholid

3、ays._________________________________________________________________3．Theonlyaccessofthecityisacrossthebridge._________________________________________________________________4．Mynewhouseispaintednow.___________________________________________________

4、______________5．Theseproblemsshouldhavesolvedmonthsago._________________________________________________________________【答案】　1.do前加to　2.like改为likes　3.of改为to　4.is后加being　5.have后加beenⅢ.阅读理解Alaska'sArcticlakesnowfreezelaterandmeltearlierintheyearthanin195

5、0，leavingthemeasytosufferwaterlossfromevaporation(蒸发)andpossiblyaddingtolocalwarming,anewstudyfinds.ThewintericeseasonnearBarrow,Alaska,isshorterthanin1950,researchersreportedJan.30inthejournalTheCryosphere.Lakeiceisalsothinnereachwinter.Thescientistss

6、urveyed402lakesontheNorthSlope，wherepermafrost(permanentlyfrozenground)andshallowlakesdominatethearea.In2011,thelakeicewas38percentthinnerthanin1950,and22percentfewerlakesfrozethroughtotheirbottoms.“Whenwesawtheactualnumberswewereshockedathowdramaticth

7、echangehasbeen，”leadstudyauthorCristinaSurdu,oftheUniversityofWaterlooinCanada，saidinastatement.Surduandhercoauthorsanalyzedthechangesinlakeicethicknessandicecoverwithsatelliteimagesandclimatemodelsimulations(satelliteimagesareonlyavailablefrom1991)．Th

8、eclimatemodelssuggesttheArcticlakesfrozealmostsixdayslaterandbrokeupabout18daysearlierinthewinterof2011paredwiththewinterof1950.“ThechangesiniceandtheshortenedwinteraffectNorthernmunitiesthatdependoniceroadstotransportgoods，”Surdusaid.F