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【C3】______: the driverless car. Nobody is sure when it will【C4】______. Google, which is testing a fleet of autonomous cars, thinks in maybe a decade, others【C5】______longer. And, when it does, the self-driving car, like the ordinary kind, could bring【C6】______change. Just imagine. It could, for a start, save the motor industry【C7】______stagnation. Carmakers are【C8】______about signs that smartphone-obsessed teenagers these days do not【C9】______to get a driving licence and buy their first car,【C10】______their parents did. But once they are【C11】______the trouble and expense of taking lessons and【C12】______a test, young adults might rediscover the joys of the open road. Another worry for the motor industry is that car use seems to be peaking in the most congested cities.【C13】______automated cars would drive nose-to-tail,【C14】______the capacity of existing roads; and since they would be able to【C15】______their passengers and drive away, the【C16】______of parking spaces in town might not matter so much. All these trends will【C17】______the car business. But when mass-produced cars appeared, they had an impact on the whole of society. Electronics and software firms will be【C18】______the winners: 【C19】______providing all the sensors and computing power that self-driving cars will need, they will enjoy strong demand for in-car entertainment systems,【C20】______cars occupants will no longer need to keep their eyes on the road. 【C1】