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Passage # 48-50    Despite the recent pair of fatal crashes involving self-driving cars, there’s wide agreement that autonomous vehicles will sharply reduce the number of people who die in motor vehicle accidents. In the U.S. alone, traffic accidents claim more than 30,000 lives a year; experts say that by the middle of this century, that toll could fall by up to 90 percent.    Eventually, driverless cars will take human motorists out of the equation entirely. When that happens, fewer traffic fatalities will be only the most obvious consequence. Because automobiles are so central to our society and national economy — and so much a part of everyday life — the switch to autonomous vehicles is likely to alter our lives in strange and remarkable ways.    Driverless cars will bring big changes to city infrastructure. Since driverless cars will move with greater precision than human-driven vehicles, streets could be narrower, with more space set aside for pedestrians and cyclists, according to a report issued last fall by the National Association of City Transportation Officials.    Crossing the street may be easier, too. With driverless cars watching out for pedestrians, people may be able to cross the streets where it makes sense, rather than trek a mile to the nearest stoplight. Driverless cars will also make for safer intersections, and perhaps even do away with traffic lights, which, of course, came about before cars themselves knew how to avoid collisions.    With more cars spending more of their time on the road rather than parked, there will be less need for parking lots and parking garages. That could free up space for other uses, including parks.    Driverless cars promise to transform the lives of people who have trouble getting around because of illness, old age, or disability. For “all those folks, this is basically a dream come true,” an engineer says of a world in which driverless cars are ubiquitous.
【題組】48. What might be the estimated annual death toll for traffic accidents in the U.S. in the middle of the century, according to the author?
(A) 30,000
(B) 27,000
(C) 3,000
(D) 2,700

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Angel Chen 高三下 (2019/09/28):

從文中In the U.S. alone, traffic accidents claim more than 30,000 lives a year; experts say that by the middle of this century, that toll could fall by up to 90 percent.

30,000 fall by up to 90 percent=30,000*1/10=3000

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