八年级英语首字母填空
Earth,ourhomeplanet,isthethirdplanetfromtheSun,ltisthefifthl_____planetinoursolarsystem.ltistheonlyplanetweknowofwherelifee____.Earthhashundredsofnamesinmanylanguages.lthasonemoon.lnsomeways,Earthiss_____toMercury,VenusandMars.Theyareallhard,rockyplanetsLikeMarsandVenus,Earthhasvolcanoes,m____andvalleys.ButEarthisdiffererti____veryimportantways.Mostofourplanetiscoveredwithwater.Theairismadeofnitrogen,oxygenandalittlecarbondioxide-justrightforustobreathe.Earthishometopeople,plantsandanimalsbecauseithasbothwaterandrightkindofatmosphere.
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