单项选择题

Questions 15 to 17 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.
Who should participate

A．People who have time.
B．All of the people.
C．Only those who have access to a phone.
D．Those with special experienc

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单项选择题

单项选择题

Questions 15 to 17 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. Who should participate 您的浏览器不支持 audio 元素。