【Thecomputerisausefulmachine.Itisthemostimportantinventioninmanyyears.Theoldestkindofcomputeristheabacus(算盘),usedinChinacenturiesago,butthefirstlarge,moderncomputerwasbuiltin1946.Acomputerthencoulddomathsprobl】

　　Thecomputerisausefulmachine.Itisthemostimportantinventioninmanyyears.Theoldestkindofcomputeristheabacus(算盘),usedinChinacenturiesago,butthefirstlarge,moderncomputerwasbuiltin1946.Acomputerthencoulddomathsproblemsquitefast.

　　Todaycomputersareusedinmanywaysandcandomanykindsofwork.Inafewyearsthecomputermaytouchthelifeofeveryone,evenpeopleinfarawayvillages.

　　Inthelastfewyears,therehavebeengreatchangesincomputers.Theyaregettingsmallerandsmaller,andcomputingfasterandfaster,Manyscientistsagreethatcomputerscannowdomanythings,buttheycannotdoeverything.Whoknowswhatthecomputersoftomorrowwillbelike?Willcomputersbringgoodthingsorbadthingstopeople?Thescientistsoftodaywillhavetodecidehowtousethecomputersoftomorrow.

　　1.Thecomputerisa_______machine.

　　A.helpfulB.strangeC.largeD.dangerous

　　2.Thefirstlarge,moderncomputerwasbuiltabout_______yearsago.

　　A.afewB.fortyC.sixtyD.eighty

　　3.Thecomputersoftodayare_______thanbefore.

　　A.biggerB.fewerC.smallerD.taller

　　4.Computerscando_______.

　　A.everythingB.anythingC.nothingD.lotsofthings

　　5.Thescientistsoftoday_______howtousethecomputersoftomorrow.

　　A.maydecideB.mustdecideC.canmakeD.needn’tmake