Waterisallaroundus．Waterisintheocean．Waterisinthelakesandrivers．Waterisintheair．Thereismorewaterthanlandontheearth．Allthingsmusthavewatertolive．Theplantsmusthaveit．Theanimalsmusthaveit．Wemusthaveit，too．Wecannotlivewithoutdrinkingwater．Sometimes，wedonothaveallthewaterthatweneed．Thelandwilldryupwithoutwater．Sometimes，therecanbetoomuchwaterintheland．Ifitrainsvery，veryhard，therainwaterwillrundownthehills．Ittakessomeofthelandwithitwhenitrunsdownthehills．Itiscallederosionwhenthewatertakesthelandaway．

Waterontheearthwillneverbeusedup．Itgoesfromtheoceantotheairtomakeclouds．Then，itfallsfromthecloudsdowntotheland．Itrunsoffthelandandouttotheoceanagain．Thecloudsmakerain．Therainfallsontotheland．Someofitgoesintotheground．Someofitwashesdownandgoesbackintotheocean．Somewaterthatfallsdownfromthecloudsisnotrain．Someofitwashesdownandgoesbackintotheocean．Somewaterthatfallsdownfromthecloudsisnotrain．Someofthiswaterissnow．Thesnowismadeofwater．Somewaterthatisnotrainorsnowfallsdownfromtheclouds．Someofthiswaterissleet（雨夹雪）．Thesleetismadeoflittlepiecesofice．Somewaterthatisnotrainorsnoworsleetfallsdownfromtheclouds．Someofthiswaterishail（冰雹）．Thehailismadeoficeballs!

1．Accordingtothepassage，weknowthat_________．

A．Wecanlivewithoutwater B．theanimalsdon'tneedwater

C．Humanbeingscan'tlivewithoutwater D．onlyplantsmusthavewater

2．Whichofthefollowingisnotmadeofwater?

A．Snow B．sleet C．hail D．land

3．Erosioninthepassagemeans_________．

A．地震 B．雪崩 C．侵蚀 D．霜冻

4．Whichofthefollowingshowsthewatercycle（循环）?

A．Waterfromtheocean→air→clouds→rain→land→ocean

B．Waterintheair→clouds→rain→land→hail

C．Waterintheclouds→snow→land→ocean

D．Rain→land→river→ocean→storm