单项选择题

Question 28 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question.
Now, Listen to the news.

A．Planting more trees.
B．Cutting down trees in snow regions.
C．Melting snow.
D．Growing flowers of a certain species.

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单项选择题

单项选择题

Question 28 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question. Now, Listen to the news. 您的浏览器不支持 audio 元素。