D
In the Americas, Asia, and Africa, there's a special kind of forest—the cloud forest. Cloud forests are usually found from 500 metres to 4,000 metres above sea level. They experience rainfall, but they also get water straight from the air.
Cloud forests are very important to both people who live nearby and the animals and plants living there. They provide water to nearby villages and cities. People drink the water, use it for cooking, and irrigate(灌溉) their farm fields with it. In Kenya, people even use water from cloud forests to produce electricity(电力). Although cloud forests only make up 2.5 per cent of the world's rainforests, they are also home to many animals and plants.
Unluckily, cloud forests now face many problems. Local poor people clear the cloud forests. They cut down trees to grow food and use the wood to heat their homes and cook. Once cloud forests are cleared, the cloud cover, which is important and necessary to the growth of these forests, goes away. Another bigger worry is that the temperature increases gradually. If world temperatures rise, cloud forests will have to move up to a higher place where the temperatures are cooler. But some cloud forests on mountain tops with nowhere to climb will die out.
Scientists worry that we might lose cloud forests, along with the water and other services they provide. Some governments have taken action to protect cloud forests. They make laws against cutting down trees in the cloud forests. They provide the local people with other ways to get food and energy. They also educate the local people on how cloud forests provide fresh water and what will happen when they are cleared to make sure a happy dance between humans and nature.
Cloud forests are too valuable to lose. We must save them—plus the animals and plants they support—before it's too late.
()37. Why are cloud forests in danger?
A. Because farmers irrigate their farm fields.
B. Because governments cut down trees.
C. Because there are fewer mountains to climb.
D. Because the temperature gets warmer.
()38. What is Paragraph 4 mainly talking about?
A. People are doing harm to the cloud forest.
B. People are making better use of the cloud forest.
C. People are trying to save the cloud forest.
D. People have turned the cloud forest green.
()39. What can we infer(推断) from the passage?
A. Cloud forests are from 500 metres to 4,000 metres below sea level.
B. Cloud forests provide water to support people in many ways.
C. Cloud forests will die out when the temperatures are cooler.
D. Cloud forests can dance with people when working together.
()40. The writing purpose(目的) of this passage is to .
A. describe the problems of the cloud forest
B. discover the secrets of the cloud forest
C. tell the stories about the cloud forest
D. show the importance of the cloud forest

D
【语篇解读】本文是一篇说明文，介绍了云雾森林的重要性、面临的问题及保护举措，呼吁人们拯救云雾森林。
37~40 DCBD

【分析】
这是一篇关于云雾森林的说明文阅读理解，需结合题干关键词定位原文对应内容，逐一分析选项得出答案。
37题：题干问云雾森林面临危险的原因，定位到第三段。第三段提到两个核心问题：一是当地人砍伐森林，二是温度逐渐升高。分析选项：A选项“农民灌溉农田”是云雾森林的益处，并非危险原因；B选项“政府砍树”与原文“当地人砍伐”的主体不符；C选项“没有更多山可爬”仅针对山顶的云雾森林，不是普遍危险原因；D选项“温度变暖”对应原文“temperature increases gradually”，符合题意，故选D。
38题：题干问第四段主旨，第四段主要讲述各国政府通过立法、提供替代生计、教育当地人等措施保护云雾森林，核心是人们在努力拯救云雾森林，对应选项C。
39题：题干要求推断内容，需逐一核对选项：A选项与原文“500 metres to 4,000 metres above sea level”不符；B选项符合原文云雾森林为人类提供多方面用水的描述；C选项与原文“温度升高时山顶云雾森林会灭绝”的逻辑不符；D选项曲解原文“a happy dance between humans and nature”的含义，并非森林能跳舞，故选B。
40题：题干问写作目的，全文先介绍云雾森林的重要性，再讲其面临的问题，最后呼吁拯救，核心是展示云雾森林的重要性，对应选项D。
【解析】
37题：定位第三段，根据“Another bigger worry is that the temperature increases gradually”可知温度升高是云雾森林危险的主要原因，故选D。
38题：第四段围绕政府保护云雾森林的具体措施展开，主旨是人们在积极拯救云雾森林，故选C。
39题：A项与原文“above sea level”矛盾；B项符合原文云雾森林为人类提供饮用、灌溉、发电等多方面用水的描述；C项与原文温度升高导致灭绝的逻辑不符；D项曲解原文表述，故选B。
40题：文章重点阐述云雾森林的重要性，呼吁人们保护，写作目的是展示其重要性，故选D。
【答案】37.D 38.C 39.B 40.D
【知识点】说明文阅读，细节理解，推理判断，主旨大意
【点评】本文围绕云雾森林展开，考查学生对说明文信息的定位、理解和归纳能力，需准确把握原文细节与作者意图，难度适中。
【难度系数】0.6