单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Why was the speed limit set at 55 miles per hour in the first place

A．The older people wanted it.
B．The voters decided on it.
C．Speeds above 55 were not safe.
D．The U.S. had a fuel crisis.

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单项选择题

单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Why was the speed limit set at 55 miles per hour in the first place 您的浏览器不支持 audio 元素。