Unit11TheMediaPeriodTwoLesson2andLesson3课时精练（北师大版必修4，广东专用）时间：30分钟Ⅰ.语法填空阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。AssettlersmovedtoCalifornia__1__themidnineteenthcentury，theybecameconcernedaboutthelackofrapid__2__(communicate)withtheeasternUnitedStates.Becauseofthedangersandhardshipsof__3__(cross)theWest，mailoftendidnotarrive.Thereforethemostimportantmails__4__(send)viaPanama，__5__tookamonthormore.In1860astagecoachcompanydecidedtomeettheproblembybeginningthePonyExpress.Thecompanyhired__6__bravestridersandboughtthefastesthorses__7__(use)asrelay(替换)teamsbetweenMissouriandCalifornia，andthecompanypromised__8__mailswouldbesentintendays.Thecompanyestablishedtwohundredstationsalongtherouteatwhichriderscouldrestandchangehorses.Inlessthantwoyears，__9__，telegraphlineswerecompletedandthePonyExpresswas__10__longerneeded.1．in[考查短语inthemidnineteenthcentury，在19世纪中期，其中的定冠词不能省。]2．communication[communicate是动词，而rapid是形容词，作定语修饰名词，所以应填communicate的名词形式communication。]3．crossing[of是介词，其后应该用v.ing形式。]4．weresent[“”根据句意最重要的邮件都是经由巴拿马被邮寄到加利福尼亚可知mail和send之间是被动关系，用被动形式。并且主语是mails，为复数形式，又根据后面定语“从句中谓语动词took”是过去时，所以该空应填weresent。]5．which[“”“”这要花费一个月或更多的时间，句中这指的是经由巴拿马邮寄邮件这件事，所以，这是一个非限制性定语从句，故用which引导。]6．the[“考查the”＋形容词最高级的用法，意为最勇敢的骑士。]7．tobeused[“”从买最快的马用来接力传递邮件可知horses与use之间存在被动关系，所以填tobeused，此不定式作目的状语。]8．that[promise后缺宾语，而空后面是完整的宾语从句，所以所填词必须能引导宾语“”从句而又不作句中成分，又没有是否之意，所以用that。]9．however[“”然而，在不到两年的时间里，电报线路已经被完成。根据这一句意和空格后的逗号可判断需要的是however这个词。]10．no[考查nolonger“”不再这一短语。]Ⅱ.阅读理解AAverticalfarmisaconceptfarmwhichisplantedonlevelsorfloors.Askyscrapertypebuildingcanhouseaverticalfarm.Sincethegardenisbuiltupwards，ratherthanoutwards，itrequiresmuchlessspacethanaconventional(传统的)farm.Theworldisquicklyrunningoutofroomforconventionalfarming.Verticalfarmscouldbeakeytothissituation.An18storyverticalfarmcouldfeedasmanyas50,000people，allinanareawhichisthesizeoftheaveragecityblock.Verticalfarmsinthecitycouldcutdownontransportationcostsaswell.Thinkabouttheamountoffuelittakestotransportfoodfromfarmlandtocity.Theresourcessavedwouldbesurprising.Besidessavingtraveltime，foodwouldbedeliveredinfresherconditionandwithlessdamage.Thereisagrowingconcernabouttheuseofpesticides(杀虫剂)inagriculturetoday.Buttheverticalfarmwouldbeagreenhousetypeenvironment，avoidingtheneedforalargenumberofpesticides.Verticalfarmscanbebuiltinacontainedspace，thereforetheyareanexcellentsolutionforlivingwellinanenvironmentfardifferentfromourown.Hydroponics(水耕法)couldbeabigpartofverticalgardening.Thiswouldreducetheamountofsoilneededtogrowfood.Ofcourse，notallfooddoeswellwiththistypeofplanting，buttherearemanycropsthatactuallyseemtodobetter.Insomeclimates，alackofsunlightcreatesashortgrowingseason.Thesolarpoweroptionmaynotworkaswellhere.Theadditionofgrowlightswouldmakeitpossibletogrowcropsinverticalgardensintheseareas.Inotherwords，wecouldgrowcropsinareaswherew...
