学年人教版选修七unit 3 under the sea using language课时作业Word格式.docx

学年人教版选修七unit 3 under the sea using language课时作业Word格式.docx

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阅读下面短文，掌握其大意，然后从各小题所给的四个选项（A、B、C和D）中，选出最佳选项。

Amarinebiologistplacedasharkintoalargeholdingtankandthenreleasedseveralsmallbaitfishintothetank.Theresultmetyour1,thesharkquicklyswamacrossthetank,attackedandatethesmallerfish.

Thebiologistthen2astrongpieceoffiberglassintothetank,creatingtwo3parts.Shethenputthesharkononesideofthe4fiberglassandanewsetofbaitfishontheother.5,thesharkquicklyattacked.Butthistime,theshark6becauseitknockedhardagainstthefiberglass7.Determined,thesharkkept8thisbehavioreveryfewminutes,but9.Meanwhile,thebaitfishswamaround10inthesecondpart.Eventually,theshark11hopeofhunting.Thisexperimentwascarriedoutseveraltimes.Eachtime,thesharkgotless12andmadefewerattemptstoattackthefish,untilit13hittingthefiberglassandsimplystoppedattacking.Thebiologistthen14thefiberglass,butthesharkdidn’tattack.Thesharkwastrainedtobelievea15existedbetweenitandthebaitfish,16thebaitfishcouldswimwherevertheywished,freefromharm.

Manyofus,afterexperiencingsetbacksandfailures,17giveupandstoptrying.Likethesharkinthestory,webelievethat18wewereunsuccessfulinthepast,wewillalwaysbeunsuccessful.19,evenwhenno"

real"

obstacleexistsbetweenwhereweareandwherewewanttogo,we20seeobstaclesinourheads.

1.A.demandsB.expectationsC.schedulesD.requirements

2.A.changedB.addedC.insertedD.crashed

3.A.separateB.oppositeC.connectedD.relevant

4.A.delicateB.hiddenC.transparentD.flexible

5.A.YetB.MeanwhileC.InsteadD.Again

6.A.bouncedB.pausedC.withdrewD.leapt

7.A.trapperB.catcherC.testerD.divider

8.A.accomplishingB.repeatingC.copyingD.strengthening

9.A.inorderB.invainC.insecretD.inpain

10.A.unaccustomedB.unchallengedC.unharmedD.unnoticed

11.A.divorcedB.declinedC.raisedD.abandoned

12.A.blindB.aggressiveC.alertD.arbitrary

13.A.gotoccupiedwithB.gotinvolvedin

C.gottiredofD.gotusedto

14.A.readjustedB.restoredC.replacedD.removed

15.A.barrierB.distanceC.gapD.distinction

16.A.soB.butC.asD.for

17.A.readilyB.intentionallyC.emotionallyD.physically

18.A.becauseB.thoughC.unlessD.while

19.A.AboveallB.InotherwordsC.AsaresultD.Inconclusion

20.A.abruptlyB.constantlyC.eventuallyD.occasionally

II.阅读理解

A

Untilrecently,scientistshadmappedonlyabout20percentoftheseafloor.Butourknowledgeofthedeepseasischangingbecauseofinformationfromsatellites.Scientistshaveproducedanewmapthatprovidesadetailedpictureoftheoceans.Themapisexpectedtohelpoceanographers（海洋学家）,industryandgovernments.

Thenewmapistwiceasdetailedasthemapmade20yearsago.DavidSandwellisageophysicsprofessorattheUniversityofCalifornia.Heandotherscientistsworkedonthemappingproject.Hesaystheyturnedtospacetolookdeeperintotheocean.

Thescientistscollectedandstudiedinformationfromtwosatellites.SomeofthedatacamefromtheEuropeanSpaceAgency’sCryo-2satellite.ItwasplacedinEarth'

sorbittowatchseaice.TheothersatelliteistheAmericanspaceagency'

sJason-1.Itisstudyingthesurfaceoftheoceans.Scientistscombinedthesatellitedatawithimagesgatheredbysonar（声波定位仪）equipmentonships.Sonarworksbysendingsoundwavesthroughthewater.Whenthesoundwaveshitanobject,itspresenceisconfirmed.

Thenewmapshowstheseafloorasithasneverbeenseenbefore.Itshowsthousandsofunderwatermountainsandplaceswherecontinentspulledapart.Itshowswhereearthquakeswereactivemanyyearsago.Theyallareburieddeepunderneaththeoceanfloor.

DavidSandwellsaysthemapisapowerfultoolforfisheries,thoseinterestedinprotectingtheenvironmentandforoilexploration.

“Thepetrolexplorationindustryisinterestedinhowtoreconnectthecontinents,bringthembacktogethertectonicallysoyoucanmapthebasinsononecontinentaledge—say,Africa—andusethattoestablishwherethesimilarbasinwouldbeontheothercontinentaledgeinSouthAmerica.”

Ifscientistsknowthatinformation,theymaybeabletofindoilfields.Thenewdataalsowillhelpscientistsimprovetheirestimatesofoceandepths.Thisinformationcanhelpshipstravelsafelyandimprovemilitaryoperationsandscientificprojectsworldwide.

Mr.Sandwellthinksscientistswillmakemanymorediscoveriesastheyexaminethenewmapandtheinformationit