YoumaytakeTVforgranted.Why?MostpeoplehaveaTVandwatchiteveryday.Butifyouwereborn100yearsago,youwouldnotbeabletowatchTV.Youwouldn’tevenknowwhatTVis!Inthe19thcentury,scientistsstartedtothinkabouthowto

　　YoumaytakeTVforgranted.Why?MostpeoplehaveaTVandwatchiteveryday.Butifyouwereborn100yearsago,youwouldnotbeabletowatchTV.Youwouldn’tevenknowwhatTVis!Inthe19thcentury,scientistsstartedtothinkabouthowtomakemachinesthatsendpicturesalongway.In1900,theythoughtofawordforthiskindofmachine–television.Sincethen,manypeoplearoundtheworldhavetriedtobuildaTV.OneearlyinventorwasaScottishengineernamedJohnLogieBaird.HebuiltthefirstTVinBritainin1926.Onhistelevision,peoplecouldseeaperson’sface.Butthefacewasnotveryclearandcouldn’tmove.Aroundthesametime,in1927,AmericanPhiloFarnsworthbuiltthefirstmoderntelevision.Histelevisiononlyshowedasimpleblackline.Itdidn’thaveanysoundbutthepicturecouldmove.Farnsworthwasonly20whenhebuiltthefirsttelevision.ButhewasnottheonlyinventorofTV.RussianVladimirZworkinalsoinventedmanyimportantthings.Overthenextfewyears,televisionsreallystartedtoimprove.Inthe1930s,peoplebegantomakeTVprogrammes.In1938,familiescouldbuytelevisionsandwatchthemathome.Theearlytelevisionswereblackandwhite,andtherewereonlyafewchannels(频道).Someofthemhadtobeusedwitharadiosothatpeoplecouldlistenaswellassee.Later,peoplecouldbuycolourtelevisions.By1967,mostTVprogrammeswereincolour.（1）.Thispassagemainlytellsus____.　A.whatatelevisionisB.howatelevisionworksC.howthetelevisionwasinventedD.whyitisgoodtowatchtelevision（2）.Whichofthefollowingstatementsistrueaboutthefirsttelevision?A.ItwasmadeinChina.B.Itcouldshowclearpictures.C.Itwasinventedbyanengineer.D.Thepicturesonitcouldmove.（3）Thefirstmoderntelevisionwasbetterthantheoldonesbecause____.A.itonlyshowedablackline.　B.itshowedpictureswithsoundsC.thepictureswereincolourD.thepicturescouldmove（4）.Theunderlinedword“improve”means“____”.A.getbetter　B.impossibleC.importantD.sellwell