单项选择题

Questions 23 to 25 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions.
Now, listen to the news.
According to the news, ice from Greenland gives information about

A．oxygen.
B．ancient weather.
C．carbon dioxide.
D．temperature.

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单项选择题

单项选择题

Questions 23 to 25 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now, listen to the news. According to the news, ice from Greenland gives information about 您的浏览器不支持 audio 元素。