四、阅读理解
Rainforests cover 6% of the earth's surface. There are rainforests in many parts of the world, but the biggest forests are in South America, Africa and South-east Asia. There aren't any rainforests in Europe or North America.
About 75% of all the kinds of animals we know live in rainforests. Thousands and thousands of animals live in rainforests. There are many beautiful birds, insects and so on. Many of them live in the trees, over 30 metres from the ground. The tallest trees can grow as high as a 10-story building! There are also thousands of different plants. $\frac{1}{4}$ of them are tall trees! It is always hot in a rainforest and the ground is always wet! It is also very dark there. Scientists believe there may be millions of undiscovered species (物种) there!
Rainforests are very important for us. We need them! The trees and other plants in the forest help make the air clean. They are like the earth's natural air purifiers (净化器). They also help control (控制) the soil! They give us wood, rubber, fruits and many of our medicines. Without rainforests, our planet would be a very different place.
Unluckily, in many places, the rainforests are in danger. For example, many years ago, there was a large rainforest in Java, but now it's almost gone. The rainforest area is getting smaller now in many other parts of the world. Every minute, an area of rainforest the size of a football field is destroyed! We can never imagine a world without rainforests. If rainforests disappeared (消失) from the earth, we would find no trees, flowers or fruit. What's more, we wouldn't get clean air, and we wouldn't find any animals. The worst result would be that we wouldn't find any humans. It's time to take action to save rainforests. Every small action to protect them counts!
() 1. Where can't we find the rainforests?
A. In Asia.
B. In Africa.
C. In America.
D. In Europe.
() 2. What does the underlined word "them" in Paragraph 2 refer to?
A. The animals.
B. The birds.
C. The insects.
D. The plants.
() 3. What can we learn about the rainforests?
A. Most of the plants in rainforests are tall trees.
B. It is cool in the rainforests and the ground is always wet.
C. The rainforests give us clean air and are always bright there.
D. Rainforests in many parts of the world are in danger.
() 4. What may the writer go on to talk about in the following part?
A. Reasons for rainforests in danger.
B. Ways to protect rainforests.
C. Actions to plant more tall trees.
D. Results of losing rainforests.
() 5. Where can we probably find the passage?
A. In a notice.
B. In a storybook.
C. In a nature magazine.
D. In a travel guide.

1. D 2. D 3. D 4. B 5. C

【分析】
这是一篇关于热带雨林的英语阅读理解题，需结合原文内容逐一分析各题目。解题思路：1. 细节查找题需回到原文定位对应信息，排除错误选项；2. 词义猜测题结合上下文指代关系判断；3. 推理判断题结合文章结尾逻辑推断后续内容；4. 文章出处题根据主题判断载体。
【解析】
1. 细节理解题：根据原文第一段最后一句“There aren't any rainforests in Europe or North America.”可知，欧洲没有雨林，故选D。
2. 词义猜测题：根据第二段划线词所在句“There are also thousands of different plants. 1/4 of them are tall trees!”可知，them指代前文的复数名词plants，故选D。
3. 细节理解题：A项原文仅提到1/4的植物是高树，并非大部分，错误；B项原文说明雨林总是炎热，而非凉爽，错误；C项原文提到雨林很暗，并非明亮，错误；D项根据第四段第一句“Unluckily, in many places, the rainforests are in danger.”可知正确，故选D。
4. 推理判断题：最后一段结尾提到“It's time to take action to save rainforests.”，逻辑上接下来应讲述保护雨林的方法，故选B。
5. 文章出处题：文章主题是介绍热带雨林的自然知识，最可能出自自然杂志，故选C。
【答案】
1.D 2.D 3.D 4.B 5.C
【知识点】
英语阅读理解、细节理解、词义猜测
【点评】
本题围绕热带雨林展开，考查学生对英语阅读中细节查找、词义猜测、推理判断及文章出处的掌握，题目难度适中，需学生仔细阅读原文定位关键信息。
【难度系数】
0.7