阅读理解AFromfaroutinspace,Earthlookslikeablueball.Sincewatercoversthree-fourthsoftheEarth’ssurface,blueisthecolorweseemost.Thecontinentslookbrown,likesmallislandsfloatinginthehuge,bluesea.WhitecloudscoveraroundtheEarthlikealightblanket.TheEarthisshapedlikeasphere,oraball.Itis25,000milesaround!Itwouldtakemorethanayeartowalkaroundthewholeplanet.Aspaceshipcanflyaroundthewidestpartofthesphereinonly90minutes.EventhoughspaceshipshavetraveledtotheMoon,peoplecannotvisittheMoonwithoutspecialsuits.TheMoonhasnoairorwater.Plantsandanimalscan’tlivethereeither.AstronautsfirstlandedontheMoonin1969.Afterthat,thereweresixmoretripstotheMoon.TheybroughtbackMoonrocks,whichscientistsarestillstudying.Thereareholes,orcraters,allovertheMoon’ssurface.Scientistsbelievethatmeteorites（陨石）smashedintotheMoonmillionsofyearsagoandformedthecraters.TheSunisthecloseststartoEarth.Astarisahotballofburninggas.TheSunlooksverybigbecauseitissoclose.ButtheSunisjustamedium-sizedstar.Billionsoffar-awaystarsaremuchbiggerthanourSun.TheburninggasesfromtheSunaresohotthattheywarmtheEarthfrom93millionmilesaway!EventhoughtheSunisalwaysshining,thenighthereonEarthisdark.That’sbecausetheEarthrotates,orturnsaround,every24hours.Duringtheday,theEarthfacestheSun.Thenweseelight.Duringthenight,theEarthturnsawayfromtheSun.Thenitfacesthedarknessofspace.EachdaywelearnmoreabouttheEarth,theMoonandtheSun.56.WhenwelookattheEarthfromouterspace,thecolorweseemostisbluebecause________.A.mostoftheEarthiscoveredinlandB.theSun’sraysmaketheEarthlookblueC.mostoftheEarthiscoveredinwaterD.cloudswraparoundtheEarth57.What’sthemeaningoftheunderlinedword“smashed”inthesecondparagraph?A.crashedB.madeC.brokeD.got58.WhatcausesdaylightonEarth?A.ThefullMooncausesdaylight.B.DaylightiscausedbytheEarthfacingawayfromtheSun.C.TheheatoftheSun’srayscausesdaylight.D.DaylightiscausedbytheEarthfacingtowardtheSun.59.WhichofthefollowingsentencesBESTdescribestheSun?A.TheSunlookssmallbecauseitissofarfromEarth.B.TheSunisaballofburninggasesthatgivestheEarthheatandlight.C.TheSunisasmallstar.D.TheSunisnotashotasitlooks.60.Whatisthemainideaofthetext?A.Plantsandanimalscan’tliveontheMoon.B.WithouttheSunwewouldhavenoheatorlight.C.WeknowalotabouttheEarth,Moon,andSun,butthereisstillmoretolearn.1D.Fromouterspace,theEarthlookstiny,eventhoughitisthousandsofmilesaround.BSacagaweawasbornsometimearound1790.SheisbestknownforherroleinhelpingtheLewisandClarkexpedition（远征）.SheandherhusbandwereguidesfromtheGreatPlainstothePacificOceanandback.SacagaweawastakenawayfromherShoshonevillagebyHidatsaIndianswhenshewas12yearsold.Andshewasimmediatelysoldintoslavery.ShewasthensoldtoaFrenchhunterbythenameofToussaintCharbonneau.ThepairbecamemarriedandhadasonnamedJean-Baptiste.AlthoughtherearedifferentopinionsconcerninghowimportantSacagaweawastotheLewisandClarkexpedition,shedidserveastheinterpreter（口译员）andnegotiatortotheShoshonetribe（部落）thatwasledbyherbrotherCameahwait.Shehelpedthemgetbasicsuppliesandhorseswhileshecarriedherbabyonherback.Besides,Sacagaweahelpedrecognizeedible(可食的)plantsandherbsandpreventedunfriendlyrelationswithothertribessimplybybeingwiththeexpedition.Shewasevenmoreimportantonthereturntripbecauseshewasfamiliarwiththeareasinwhichtheyweretravelingandwasabletoguidetheexpeditionbacksafely.LewisandClarkreceivedcreditfordiscoveringhundredsofanimalsandplantsthatS...
