单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.
Generally speaking, a rock concert takes place at about ______.

A．40 decibels
B．90 decibels
C．110 decibels
D．160 decibels

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单项选择题

单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. Generally speaking, a rock concert takes place at about ______. 您的浏览器不支持 audio 元素。