阅读下列短文，从每题所给的A.B.C和D项中，选出最佳选项。Withoutmostpeoplerealizingit,therehasbeenarevolutioninofficeworkoverthelasttenyears.Beforethattime,largecomputerswereonlyusedbylarge,richcompaniesthatcouldaffordtheinvestment.Withtheadvancementoftechnology,smallcomputershavecomeontothemarket,whicharecapableofdoingtheworkthatusedtobedonebymuchlargerandexpensivecomputers,sonowmostsmallercompaniescanusethem.Themaindevelopmentinsmallcomputershasbeeninthefieldofwordprocessors(处理器),orWPSastheyareoftencalled.40%ofBritishofficesarenowestimatedtohaveawordprocessorandthispercentageisgrowingfast.Therearemanyadvantagesinusingawordprocessorforbothsecretaryandmanager.Thesecretaryisfreedfromalotofdailywork,suchasre-typinglettersandstoringpapers.Heorshecanusethistimetodoothermoreinterestingworkfortheboss.Fromamanager’spointofview,secretarialtimeisbeingmadebetteruseofandmoneycanbesavedbydoingdailyjobsautomaticallyoutsideofficehours.Butisitallgood?Ifalotofdailysecretarialworkcanbedoneautomatically,surelythiswillmeanthatfewersecretarieswillbeneeded.Anotherworryistheincreasingmedicalproblemsrelatedtoworkwithvisualdisplayunits(显示器).Thecaseofaslowlossofsightamongpeopleusingwordprocessorsseemstohaverisengreatly.ItisalsofearedthatifawomanworksataVDUforlonghours,theunbornchildinherbodymightbekilled.SafetyscreenstoputoveraVDUhavebeeninventedbutfewcompaniesinEnglandbothertobuythem.Whatevertheargumentsforandagainstwordprocessorare,theyareakeyfeature(特征)ofthisrevolutioninofficepractice.1.Tenyearsago,smallercompaniesdidnotuselargecomputersbecause_________.A.thesecompanieshadnotenoughmoneytobuysuchexpensivecomputersB.thesecomputerscouldnotdotheworkthatsmallcomputerscandotodayC.thesecomputersdidnotcomeontothemarketD.thesecompaniesdidnotneedtousethisnewtechnology2.Accordingtothewriter,themainfeatureoftherevolutioninofficeworkoverthelasttenyearsis__________.A.thesavingoftimeandmoneyB.theuseofcomputersinsmallcompaniesC.thewideuseofwordprocessorsD.thedecreasingnumberofsecretaries3.Itisimpliedbu