2. 考研
  3. Since Henry Ford turned it into a mass-market product a century ago, the car has delivered many benefits. It has【C1】______econom

Since Henry Ford turned it into a mass-market product a century ago, the car has delivered many benefits. It has【C1】______econom

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问题     Since Henry Ford turned it into a mass-market product a century ago, the car has delivered many benefits. It has【C1】______economic growth, increased social mobility and given people a lot of【C2】______. No wonder mankind has taken to the vehicle with such【C3】______that there are now a billion automobiles on the world’s roads.
   【C4】______the car has also brought many【C5】______. It pollutes the air, creates crowding and kills people. An【C6】______1.24m people die, and as many as 50m are hurt, in road accidents each year. Drivers and【C7】______waste around 90 billion hours in traffic jams each year.
    Fortunately, an【C8】______technology promises to make motoring more【C9】______less polluting and less【C10】______to hold-ups. "Connected cars"—which may eventually evolve into driverless cars but for the foreseeable future will still have a human at the【C11】______—can communicate wirelessly with each other and with traffic-management systems, avoid【C12】______and other vehicles and find open parking spots.
    Some parts of the【C13】______are already in place. Many new cars are already being fitted with equipment that lets them maintain their distance and stay in a motorway lane automatically at a range of speeds, and【C14】______a parking space and slot into it Singapore has led the way with using variable tolls to【C15】______traffic flows during rush-hours; Britain is【C16】______"smart motorways", whose speed limits vary constantly to achieve a similar effect. Combined, these【C17】______could create a much more efficient system in which cars and their drivers are constantly【C18】______to hazards and routed around blockages, traffic always flows at the【C19】______speed and vehicles can travel closer together, yet with less risk of【C20】______.
【C19】
选项 A、optimum
B、normal
C、low
D、minimal
答案A
解析 上文提及的“高峰期使用弹性收费的措施”以及“车辆避开拥堵”均有助于缓解路面的拥堵，从而使得行车速度加快。故选A项optimum“最佳的”。
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