单项选择题

Questions 5 to 7 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now listen to the conversation. According to Cindy, what is the purpose of the synthesized voice on "smart" cars

A．To warn of dangers.
B．To explain traffic regulations.
C．To wake up drivers who are falling asleep.
D．To give directions.

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单项选择题

单项选择题

Questions 5 to 7 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. According to Cindy, what is the purpose of the synthesized voice on "smart" cars 您的浏览器不支持 audio 元素。