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1、Unit2Healthyeating Ⅰ.阅读理解AThere?snodoubtthatwaterisvitaltoanylife.About60percentoftheaverageadulthumanbodyismadeofwater.Thisincludesmostofyourbrain,heart,lungs,musclesandskin,andevenabout30percentofyourbones.Yetthere?slittlescientificagreementabouttheexactamountofth
2、estuffanindividualshouldconsumeeachday.Sohowmuchwaterdoyouactuallyneedtodrinktobehealthy? Youmayhaveheardthatyoushoulddrinkeight8-ounceglassesofwateraday.Yet,thedownsideofthisrule,researcherssay,isthatdrinkingwaterbytheglassisnottheonlywaythathumanstakeinit.The“8×8”
3、ruleessentiallyoverlookstwobigsourcesofdailywaterconsumption.Onesuchsourceisfood.Everythingyoueatcontainssomewater.Watermelons,forexample,aremorethan90percentwaterbyweight.Differentdietsnaturallycontaindifferentamountsofwater.Theotherkeywatersourceisotherbeverages.N
4、on-alcoholicdrinkssuchascoffee,andtea,containmostlywaterandallcontributetoyourhydration(水量).So,amongallthefood,waterandotherfluidsyouconsumeinaday,howmuchwatershouldyouaimtotakein?TheNationalAcademyofSciencessuggeststhatwomenconsumeatotalofapproximately2.7litres(91o
5、unces)ofwaterfromallbeveragesandfoodseachdayandmen3.7litres(125ounces).Butthesearejustgeneralguidelines.Thetruthisthatthereisnomagicstandardforhydration—everyone?sneedvariesdependingontheirage,weight,levelofphysicalactivity,generalhealthandeventheclimatetheylivein.T
6、hemorewateryoulose,themorewateryou?llneedtoreplacewithfoodanddrink.Ifyouarelookingforconcreteadvice,though,thebestplacetolookiswithin.Drinkwaterwhenyou?rethirsty.1.HowdoestheauthorsupporttheunderlinedsentenceinParagraph1?A.Byprovidingfacts.B.Byaskingaquestion.C.Byma
7、kingacomparison.D.Byputtingforwardsuggestions.2.Accordingtothe“8×8”rule,howmuchwatershouldwetakeinaday?A.8ounces.B.64ounces.C.91ounces.D.125ounces.3.What?sthedisadvantageofthe“8×8”rule?A.Thewaterfrombothfoodandotherbeveragesisignored.B.Itincludestheamountofwaterfrom
8、bothfoodandbeverages.C.Itdoesnottakewaterfromdrinksintoaccount.D.Itoverlooksthefactthatwetakein90%ofthewaterfromfruits.4.Whatcanweinferfro
