Thebicycleisoneofthesimplestyetmostusefulinventions(发明)intheworld．WhatismostsurprisingisthatitwasnotinventedearlieralthoughthegreatinventorLeonardodaVincihaddrawn

　　Thebicycleisoneofthesimplestyetmostusefulinventions(发明)intheworld．WhatismostsurprisingisthatitwasnotinventedearlieralthoughthegreatinventorLeonardodaVincihaddrawnpicturesforbicyclesandalsoforflyingmachinesandsomeotherthings．Thosethingswerenotproduced(生产)untillongafterhedied．

　　Apersonridingabicycleuseslittleenergy(能量)tomakethebicyclemoveandthereisnopollution(污染)atallwhenyouareriding．Evensoindevelopedcountriesmostpeopledon’ttraveltoworkbybicycle．Itisnotbecausethebicyclesareexpensiveorpeoplefeeltirediftheyridetowork．It’sbecausethenumberofcarsontheroadsbecomeslarger．Itcertainlybecomesmoredangeroustorideabicycle．Asaresultmorepeopleputtheirbicyclesawayandgotoworkintheircarsandinthiswaythesituation(情形)ismademoreserious．Perhapsthebestwaytomakeridingsaferandmorepopularistocreatepaths(开设通道)onlyforbicyclesandtomakeitsodifficultandexpensivefordriverstotaketheircarsintothecitythattheywillgobacktousingtheirbicycles．

　　(1)

　　Bicycleswasinvented________．

　　[]A．

　　byLeonardodaVinci

　　B．

　　longbeforeLeonardodaVincidied

　　C．

　　soonafterLeonardodaVincidied

　　D．

　　longafterLeonardodaVincidied

　　(2)

　　Ifyouwanttomakethebicyclemoveyouneed________．

　　[]A．

　　rideashardasyoucan

　　B．

　　noenergyatall

　　C．

　　littleenergy

　　D．

　　quitealotofenergy

　　(3)