要对知识真正的精通就必须对知识进行活学活用，下面是精品学习网为大家带来的外研版高二英语下册unit6随堂练习，希望大家通过这个能真正的对知识灵活运用。

.完形填空

ItwasJuly1976.Anunmannedspaceship,VikingOne,hadarrivedatMars.OnJuly20th,thespaceship 1 .Partofitcontinuedtowardalandingontheplanet.Itfell 2 throughthelateafternoonMars’sky.

Fortykilometersabovetheplanet,thethin 3 begantoslowitsfall.Sixkilometersabovetheplanetabigparachute(降落伞)opened.Thelandingcraftfellmoreslowly.Then,threerocketengines 4 .Andthelandingcraftsetdown 5 onthesurface. 6 intheVikingOneLanderimmediatelysentamessagetotheearth.Itsaid,“Iamhere.Iamdownsafely.Iambeginningmywork.”

Themessage 7 atthespeedoflight.Ittooktwentyminutestoreachtheearth,morethanthreehundredandtwentymillionkilometers 8 .Scientistsandengineersatthecontrolcenter 9 .

Momentslater,televisionreceiverinthecontrolcenterbeganto 10 thefirstpicturefromVikingOne.Peopleatthecentercouldseethefeetofthelandingcraftsittingfirmlyonthe 11 soilofMars.Thosepictureswereourfirst 12 lookattheplanet.Theyshowedaredsurface,fullofrocks,withnosignof 13 .Itwasourfirstlookataplanetthatisfullofsurprises,mysteriesandpromise.VikingOnewaslaunchedtowardMarsinAugust,1975.Thespaceshiphadtwo 14 :anorbiter(轨道飞行器)andalander(着陆器).Theorbiterwouldcircle 15 Mars.ItwouldtakepicturesofMars’surface.Itwould 16 theatmosphere.

The 17 wouldgodowntothesurface.Itwouldcarry 18 todigupandstudysoiland 19 .

Italsowouldreportaboutanyevidenceoflifeontheplanet.Thelanderwouldsendthis 20 totheorbiterandthenbacktotheearth.

1.A.separated B.appeared[来源:www.shulihua.net]

C.workedD.started

2.A.correctly B.slowly C.quickly D.directly

3.A.airB.universe

C.spaceD.atmosphere

4.A.firedB.fellC.openedD.floated

5.A.heavilyB.softly

C.suddenlyD.immediately

6.A.AcomputerB.Arocket

C.ApilotD.Anastronaut

7.A.spreadB.traveledC.shotD.moved

8.A.farB.longC.distantD.away

9.A.shoutedB.watched

C.cheeredD.welcomed

10.A.makeB.takeC.showD.search

11.A.redB.brownC.grayD.black

12.A.carefulB.closeC.realD.clear

13.A.menB.lifeC.treesD.air

14.A.partsB.rocketsC.enginesD.centers

15.A.throughB.towardsC.overD.around

16.A.enterB.examine

C.collectD.discover

17.A.orbiterB.lander

C.spaceshipD.rocket

18.A.engineersB.astronauts

C.parachutesD.instruments

19.A.surfaceB.treesC.rocksD.pictures

20.A.spaceshipB.rocket

C.landerD.information

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