专题21语法填空【2018·全国I】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式.Accordingtoareviewofevidenceinamedicaljournal,runnerslivethreeyears___61___(long)thannon-runners.Youdon'thavetorunfastorforlong___62___(see)thebenefit.Youmaydrink,smoke,beoverweightandstillreduceyourriskof___63___(die)earlybyrunning.Whilerunningregularlycann'tmakeyouliveforever,thereviewsaysit___64___(be)moreeffectiveatlengtheninglife___65___walking,cyclingorswimming.Twooftheauthorsofthereviewalsomadeastudypublishedin2014___66___showedamerefiveto10minutesAdayofrunningreducedtheriskofheartdiseaseandearlydeathsfromall___67___(cause).Thebestexerciseisonethatyouenjoyandwilldo.Butotherwise…it'sprobablyrunning.Toavoidkneepain,youcanrunonsoftsurfaces,doexercisesto___68___(strength)yourlegmuscles(肌肉),avoidhillsandgetgoodrunningshoes.Runningischeap,easyandit'salways___69___(energy).Ifyouaretimepoor,youneedrunforonlyhalfthetimetogetthesamebenefitsasothersports,soperhapsweshouldallgive___70___atry.【答案】61.longer62.tosee63.dying64.is65.than66.that\which67.causes68.strength69.energetic70.it\running【解析】本文是一篇说明文.文章讲述了跑步的好处,它可以帮助人们延年益寿.63.考查动名词.你也许喝酒、吸烟或超重,但仍然通过跑步会减少早亡的风险.此处of是介词,其后用动名词.故填dying.64.考查动词的时态.医学报告显示：跑步比散步、骑车和游泳更能有效地延长寿命.这里叙述的是一个事实,故用一般现在时.故填is.65.考查比较句型.跑步比散步、骑车和游泳更能有效地延长寿命.根据文章中的moreeffective可知此处填than.66.考查定语从句的关系词.此处astudy是先行词,其在定语从句中作主语,故填that或which.点睛：本文比较难的一个题是10题.短语giveitatry不容易想出来.giveatry试试.Givesbsth；givesthtosb这些短语学生都很清楚.但give后加it或sth的形式,比较少见.高考复习要尽可能多的复习相关的短语,尤其是用的比较多,而课本中出现较少的短语.【2018·全国II】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式.DietshavechangedinChina—andsotoohasitstopcrop.Since2011,thecountry___61___（grow）morecornthanrice.Cornproductionhasjumpednearly125percentover___62___past25years,whilericehasincreasedonly7percent.Atasteformeatis___63___(actual)behindthechange:Animportantpartofitscornisusedtofeedchickens,pigs,andcattle.Anotherreasonforcorn'srise:Thegovernmentencouragesfarmerstogrowcorninsteadofrice___64___(improve)waterquality.Cornuseslesswater___65___riceandcreateslessfertilizer(化肥)runoff.Thisswitchhasdecreased___66___(pollute)inthecountry'smajorlakesandreservoirsandmadedrinkingwatersaferforpeople.AccordingtotheWorldBank,Chinaaccountsforabout30percentoftotal___67___(globe)fertilizerconsumption.TheChineseMinistryofAgriculturefindsthatbetween2005—whenthegovernment___68___(start)asoil-testingprogram___69___givesspecificfertilizerrecommendationstofarmers-and2011,fertilizerusedroppedby7.7milliontons.Thatpreventedtheemission(排放)of51.8milliontonsofcarbondioxide.China'sapproachtoprotectingitsenvironmentwhile___70___(feed)itscitizens"offersusefullessonsforagricultureandfoodpolicymakersworldwide."saysthebank'sJuergenVoegele.【答案】61.hasgrown62.the63.actually64.toimprove65.than66.pollution67.global68.started69.that/which70.feeding【解析】本文是一篇说明文.文中讲述了中国为保护环境在农作物种植上做了一些变化并得到了世界上的知名认识的认可.63.考查副词.句意：对肉的需求实际上是这种变化的背后原因.句子结构完整,用副词修饰句子.故填actually.64.考查非谓语动词.句意：为了改善水质...
