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.
What is this passage talking about

A．Air pollution.
B．Noise damage.
C．Environment on campus.
D．Solutions for pollution.

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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. What is this passage talking about 您的浏览器不支持 audio 元素。