完形填空Electricbicycleswhichrunonbattery-

完形填空Electric bicycles which run on battery-operated (电瓶) motors are winning over riders of ordinary bikes1their speed, quality and environmental advantage. They were first2on 1980s in China, but the selling was not very good. Today, thanks3improvements on battery quality, the electric bikes sell well. There are now more than 100 electric bicycle producers in China and 26 million such bicycles were produced in 2011. Japan is another large4of such bicycles in the world with a total production reaching 381,72lin 2010.5China is one of the largest producers of electric bicycles in the world, the6of its producers with mass production (大批量生产) is actually small.Electric bicycles are still7in China. Time is needed for people to bee familiar with them and accept them. Each bike’s price of between 2,000 yuan (US $318) and 3,000 yuan (US $477) is still8for ordinary citizens (民众). Although such bikes are quick, safe and9to operate, their batteries still have shortings (不足). They weigh more than 10 kilograms; their service life is10two years and they11400 yuan each.There were more than 450 million bikes in China in 2006. If just one percent of all these bikes are replaced by electric12, the market will be very large. And13the battery is further improved and the price is14, many of us will not be able to keep back from15the latest electric bikes1.A.because ofB.becauseC.towardsD.at2.A.buildB.builtC.buildingD.to build3.A.forB.inC.byD.to4.A.producerB.productionC.produceD.to produce5.A.ButB.IfC.AlthoughD.When6.A.buyerB.numberC.priceD.owner7.A.oldB.tallC.newD.short8.A.smallB.largeC.expensiveD.high9.A.easyB.difficultC.hardD.easily10.A.other thanB.more thanC.overD.less than11.A.spendB.costC.takeD.make12.A.carsB.bikeC.onesD.one13.A.whereB.unlessC.whetherD.if14.A.increasedB.raisedC.reducedD.lifted15.A.buyingB.broughtC.to buyD.buy