单项选择题

Questions 14 to 16 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.
According to the speaker, the only applicable and practical method is ______.

A．reducing the emissions of vehicles
B．reducing the use of vehicles
C．using electricity-powered vehicles
D．limiting the production of vehicles

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单项选择题

单项选择题

Questions 14 to 16 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. According to the speaker, the only applicable and practical method is ______. 您的浏览器不支持 audio 元素。