Muchlessthanonepercentoftheearth'swatercanbeusedbyhumans.Areasthatneedalotofwateroftenhavetobringitinfromfaraway.Forexample,southernandcentralCaliforniagetmostoftheirwaterfromnorthernCalifornia.TheMidd
Muchlessthanonepercentoftheearth'swatercanbeusedbyhumans.Areasthatneedalotofwateroftenhavetobringitinfromfaraway.Forexample,southernandcentralCaliforniagetmostoftheirwaterfromnorthernCalifornia.TheMiddleEastandMexicoareamongtheplaceswherelargeareasareshortofwater.Muchoftheshortage(短缺)insuchplacesiscausedbypooruseofwater,suchaspollutionandwaste.
Mostplaceshaveenoughwaterfordrinking,farmingandindustries.However,ascitiesgrowlargerandindustriesexpand,moreandmorewaterisneeded.Thismaymeanthatmoresources(来源)ofwaterneedtobefound.Butbysavingwater,existing(现有的)watercanbeusedlonger.Thisallowstowns,citiesandindustriestogrowwithouttheneedtofindmorewatersources.
Whataresomewaysthatordinarypeoplecansavewater?
Asurveyshowsthatwashingclothes,takingshowersandusingtoiletsmakeupabout80percentofafamily'swaterusage.Sousingshowerheads,toilets,andtapsthatuselesswatercanhelpsavealotofwaterinthehome.
53.OneofthepossiblereasonswhyMiddleEastandMexicoareshortofwateris that___.
A.manyindustriesintheseplacesusealotofwater
B.theypolluteandwasteexistingwater
C.theyhavefewlakesandrivers
D.theydon'thaveenoughmoneytobuywater
54.What'sthemeaningoftheunderlinedword"expand"?___
A.发展 B.使用 C.浪费 D.匮乏
55.Accordingtothesurvey,whichprobablyusetheleastwaterinfamilies?___
A.Takingshowers.B.Usingtoilets.
C.Washingdishes.D.Washingclothes.
56.Whichofthefollowingcanwelearnfromthepassage?___
A.Bysavingwater,wemaynotneedtofindmorewatersources.
B.PeopleinsouthernandcentralCaliforniaarerich.
C.NorthernCaliforniawillnothaveenoughwaterinthefuture.
D.Washingclothesandwashingdishesmakeup40%ofafamily'swaterusage.
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