2. 外语
  3. A. marking B. since C. nuisance D. arrive E. profound F. signs G. explosion H. worry I. though J. passing K. decreased L

A. marking B. since C. nuisance D. arrive E. profound F. signs G. explosion H. worry I. though J. passing K. decreased L

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问题     A. marking B. since C. nuisance D. arrive E. profound
    F. signs G. explosion H. worry I. though J. passing
    K. decreased L. appeared M. drop off N. survive O. businesses
    The arrival of the mass-produced car, just over a century ago, caused a(n)【C1】______ of business creation. First came the makers of cars and all the parts that go into them. Then came the garages, filling stations and all sorts of other car-dependent【C2】______: car parks, motels, out-of-town shopping centres.
    Now another revolution on wheels is on the horizon: the driverless car. Nobody is sure when it will【C3】______. Google, which is testing a fleet of autonomous cars, thinks in maybe a decade, others reckon longer. And, when it does, the self-driving car, like the ordinary kind, could bring【C4】______ change.
    Just imagine. It could, for a start, save the motor industry from stagnation. Carmakers are anxious about【C5】______ that smartphone-obsessed teenagers these days do not rush to get a driving licence and buy their first car, as their parents did. But once they are spared the trouble and expense of taking lessons and【C6】______ a test, young adults might rediscover the joys of the open road. Another【C7】______ for the motor industry is that car use seems to be peaking in the most congested cities. Yet automated cars would drive nose-to-tail, increasing the capacity of existing roads; and since they would be able to【C8】______ their passengers and drive away, the lack of parking spaces in town might not matter so much.
    All these trends will affect the car business. But when mass-produced cars【C9】______, they had an impact on the whole of society. Electronics and software firms will be among the winners: besides providing all the sensors and computing power that self-driving cars will need, they will enjoy strong demand for in-car entertainment systems,【C10】______ cars’ occupants will no longer need to keep their eyes on the road.
【C5】
选项
答案F
解析 根据空格前的介词about和空格后的名词性从句，可知此处需要填入名词，从句作该名词的同位语。这个同位语从句说道，如今的年轻人沉迷智能手机，不再像他们父辈那般热衷于考驾照、买汽车，这是一种普遍的现象，因此填入signs“现象”。
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