“Icouldseeahugeflow(流动)ofwatercomingdownfastfromveryhigh.Ihadnoideaofshapeorsituationoranything.Itwasjustsobig.”

ThesearethewordsofthegreatEnglishwriterCharlesDickens.HewrotethemwhenhewasvisitingNiagaraFalls.Thiswaterfallisontheborder(边界)oftheUnitedStatesandCanada.ItisoneofthelargestintheworldandthelargestinNorthAmerica.

NiagaraFallsisontheNiagaraRiver.Theriverdividesjustbeforethewaterfallandthereareactuallythreewaterfalls.OntheAmericansideareAmericanFallsandBridalVeilFalls.HorseshoeFallsismostlyontheCanadianside.Thenamecomesfromitsshape—likeahorseshoeinahalfcircle.HorseshoeFallsisthewidestofthethree.

PeoplemainlyknowaboutNiagaraFallsbecauseofitssizeandnaturalbeauty.HowevertheNiagaraRiverisalsoanimportantsource(0)ofelectricity.

Inthe1890stheWestinghouseElectricCompanybuiltalargepowersystem(电力系统)ontheriver.Manyothercompaniesalsohopedtousethelandforfactoriesandpowersystems.Howeveraroundthesametimemanypeoplebegantoworktoprotectthenaturalarea.SoonthegovernmentsoftheUnitedStatesandCanadagotinvolvedwithit.TheyprotectedthelandaroundNiagaraFalls.Theymadeparks—greennaturalareas.Noonecouldbuythislandforfactories.

ForhundredsofyearsmillionsofpeoplehavevisitedNiagaraFallstoenjoyitsbeauty.

根据材料内容选择最佳答案。

( )1.FromParagraph1wecanknowCharlesDickenswasshockedbyNiagaraFalls’______.

A.speed B.color

C.beauty D.size

( )2.WhichofthefollowingisNOTtrueaboutNiagaraFalls?

A.Ithasthreewaterfalls.

B.It’sontheNiagaraRiver.

C.It’sontheborderoftwocountries.

D.It’sthelargestwaterfallintheworld.

( )3.HorseshoeFallsgetsitsnamefromits______.

A.sound B.shape

C.history D.location

( )4.Theunderlinedwords“gotinvolved”inParagraph5mean“______”inChinese.

A.支持 B.取缔

C.介入 D.退出

( )5.Whatcanwelearnfromthepassage?

A.TheNiagaraRiverisb