单项选择题

Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to an, answer the questions.
Now listen to the news.
What is the topic of the news item

A．Tropics.
B．Forests.
C．Animals.
D．Ecology.

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单项选择题

单项选择题

Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to an, answer the questions. Now listen to the news. What is the topic of the news item 您的浏览器不支持 audio 元素。