Which of the following statements is true of robo
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Which of the following statements is true of robotic drivers?
A. It will take some time before robotic drivers are available.
B. Robotic drivers are not allowed to drive on busy roads.
C. Robotic drivers can never replace human drivers.
D. Robotic drivers are too expensive to use.
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答案：A
文章最后一句话指出机器人司机可以使交通运行更通畅，也许有一天机器人会成为每个人的私人司机，但是最近的研究表明这个愿望不会很快实现，这正是选项A所 表达的意思“It will take some time before robotic drivers are available.”其他三个选项的内容文章根本就没有提及。