2015-2016学年高中英语 unit4 cyberspace section ⅳ知能演练 北师大版必修2

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1、Unit4CyberspaceSectionⅣⅠ.品句填词1．IfBill____________(tell)meyesterday,Ishouldknowwhattodonow.2．Withoutelectricityhumanlife____________(be)quitedifferenttoday.3．Jane____________(be)prettier,butshedoesn’tcaremuchaboutherclothes.4．Ifyouwanttowatchthisfilm，I____________(buy)twotickets.5．Ifmybrot

2、her____________(be)here,everythingwouldbebetter.6．He____________(give)youmorehelp,buthewassobusyatthattime.7．Ifhe____________(come),hewillbringhisviolin.8．Ifyouhadtakenthemedicineyesterday，you____________(be)wellnow.9．IfI’dleftsooner，I____________(be)ontime.10．Ifit____________(rain)again，

3、whatelsecouldwedo?答案：1.hadtold　2.wouldbe　3.couldbe　4.willbuy5．were　6.wouldhavegiven　7.comes　8.wouldbe9．wouldhavebeen　10.shouldrain/weretorain/rainedⅡ.阅读理解ATheInternetisnotperfect.Therearemanyproblemswithit.TheInternetisnotorganized.ThereisnooneinchargeoftheInternet.Itissometimesdifficultt

4、ofindwhatyouarelookingfor.Itisalsoeasytogetthewronginformationonthe“Net”．SomebusinessmencheatpeopleontheInternet.Internetthievescanstealcreditcardnumbers.Someadvertiserssendspamtoemailboxes.Emailboxesareoftenfilledwiththeseunwantedadvertisements.IllegalbusinessescanoperateontheInternet.Th

5、esebusinessessellXratedmaterials，cigarettesandalcoholtoteenagers.TheInternethaswebsiteswithinformationaboutmakingbombs，breakingthelawandterrorism.Criminalscanfoolpeople，especiallychildren，inchatrooms.Theycanspreadpoisonousinformationandattacknewmembers.TheInternetisthegreatestadvanceincom

6、municationsincehumanemerged.Butitcanalsobelikeadarkalleyinadangerouspartoftown.ParentsneedtosetparentalcontrolsontheirchildrenwhentheyusetheInternet.Thiswillkeepsomeofthebadmaterialsawayfromtheirchildren.TheInternetcanbedangeroustocomputers，too.Somepeoplewhohaveevilintentionsenjoycausingp

7、roblemsforotherpeopletheydon’tevenknow.Theycreatecomputerviruses.Acomputercangetvirusesbydownloadingaprogramthathasavirusinit.Somevirusescomebyemail.Aviruscandestroythedataapersonhassavedincomputerfiles.Aviruscancauseacomputertocrash.Aviruscanalsoreproduceitself！Itc