48. As for driverless cars, what is the author’s major concern?
A. Safety.
B. Side effects.
C. Affordability.
D. Management.
49. What does the underlined word "fielded" in Paragraph 4 probably mean?
A. Employed.
B. Replaced.
C. Shared.
D. Reduced.
50. What is the author’s attitude to the future of self-driving cars?
A. Doubtful.
B. Positive.
C. Disapproving.
D. Sympathetic.
【答案】47. A
48. D
49. A
50. B
【解析】本文为议论文。文章主要讨论有关无人驾驶汽车的发展前景和面临的问题。
47. 推理判断题。根据第二段While much of the debate so far has been focused on the safety of driverless cars(and rightfully so), policymakers also should be talking about how self-driving vehicles can help reduce traffic jams, cut emissions(排放) and offer more convenient, affordable mobility options.可知,政策制定者应该讨论无人驾驶车怎么帮助削减交通阻塞,减少尾气排放,提供更方便、更便宜的出行选择,由此可见人们应该多关注无人驾驶车怎么帮助处理与交通有关的问题。故选A。
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