Question 18 is based on the passage you have just heard.

听力原文

    Mount Etna is one of the most active volcanoes on Earth. The mountain has been in a state of near continuous eruption for half a million years. Exploring the Etna geographical area reveals a history written in fire. Before the eruptions, it was covered by forests of pine trees. Located in southern Italy, Etna is the highest active volcano in Europe. (16) However, its height often changes when volcanic material accumulates during eruptions and subsequently collapses.

    Few volcanoes in the world have an eruption history so thoroughly documented by historical records. Etna’s eruption history dates back as far as 1500 BC. Some 200 eruptions have been recorded down through the centuries, but compared with other volcanoes, most of its eruptions have so far been fairly light in terms of death and destruction. Only about 100 deaths have been attributed to the volcano. The mountain hasn’t been entirely harmless, however. In 1928, it destroyed the town of Mascali.

    (17) Over the centuries, Etna’s lowest slopes have been shaped by human hands to take advantage of rich soils for growing grapes, apples and nuts. Local people have also carved out over 200 caves in the soft rock, and used them for everything from sacred burial places to food storage. Large mammals once wandered the volcano’s slopes, but today, foxes, wild cats, rabbits and mice are more common. (18) Some of those small mammals help to sustain such big birds as golden eagles.

18. What does the speaker say about big birds like golden eagles at Mount Etna?

解析：B。根据录音结尾可知，一些小型哺乳动物可供金雕等大型鸟类捕食。B选项与文意相符。A、C、D项内容均未提及，故排除。