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1、阅读理解Passage1Whenweatherishot,yougotoalakeoranocean.Whenyouarenearalakeoranocean,youfeelcool.Why?Thesunmakestheearthhot,butitcannotmaketheweatherveryhot.Although,theairovertheearthbecomeshot,theairoverthewaterstayscool.Thehotairovertheearthrises.Thenthecoolairoverthewat
2、ermovesinandtakestheplaceofthehotair.Whenyouarenearalakeoranocean,youfeelthecoolairwhenitmovesin.Youfeelthewind,andthewindmakesyoufeelcool.Ofcourse,scientistscannotanswerallofourquestions.Ifweask,“Whyistheoceanfullofsalt?”scientistswillsaythatthesaltcomesformrocks.When
3、arockgetsveryhotorverycold,itcracks.Rainfallsintothecracks.Therainthencarriesthesaltintotheearthandintotherivers.Theriverscarrythesaltintotheocean.Butthenweask,“Whathappenstothesaltintheocean?Theoceandoesnotgetmoresaltyeveryyear.”Scientistsarenotsureabouttheanswerothis
4、question.Weknowalotaboutourworld.Buttherearestillmanyanswersthatwedonothave,andwearecurious.50/506.Themainideaofthepassageis____________.A.peoplefeelcoolwhentheyarenearalakeoranoceanB.scientistscanexplaineverythingwewanttoknowC.scientistscanexplainmanythingsexceptoneth
5、ingD.thesaltintheoceancomesfromrocks7.Youfeelcoolwhenyouarenearalakeoranoceanbecause________.A.thewaterisnotsohotastheearth.B.theearthishotC.thewateriscolderthantheearthD.coolairfromthewatermovestowardstheland8.Nowscientistsknow_______.A.whatmakespeoplefeelcoolnearalak
6、eoranoceaninsummerB.everythingabouttheoceanC.whytheoceandoesnotgetmoreandmoresaltyD.whathappenstothesaltintheocean9.Arockcrackswhen_________.A.rainfallsB.itgetsveryhotC.itgetsverycoldD.eitherBorC10.Peoplearealwayscuriousabouttheworldaroundthembecause___________.50/50A.
7、theyknownothingaboutitB.theyknowlittleaboutitC.thereareanswerstheydonothaveD.therearealotofinterestingstoriesaboutitPassage2Ifyoudonotuseyourarmsoryourlegsforsometime,theywillbecomeweak,whenyoustartusingthemagain,theyslowlybecomestrongagain.Everybodyknowsthat.Yetmanype
8、opledonotseemtoknowthatmemoryworksinthesameway.Whensomeonesaysthathehasagoodmemory,hereallymeansthathekeepshismemoryi
