C 跨学科 水循环 (2026·扬州中学树人教育集团期末改编)
① Water is important for all living things on earth. The water cycle(循环) moves water from the ground to the [视频学重难] sky and back again. It is a year-round cycle that is the most active from March to June in China.
② The water cycle always begins with water vapour(水蒸气). When it's hot outside, you can see clouds forming in the sky. These clouds are made of water vapour that comes from the ground, plants and rivers. As water vapour rises into the sky, it cools down and becomes clouds. After that, clouds travel through the sky and fall back to the earth as rain or snow. Then, water runs through rivers and oceans and finally returns to the earth again in different forms like rainwater or snow.
③ The water cycle is important in protecting our earth's climate. It provides us with water to drink and keeps our climate healthy. Water evaporates(蒸发) from rivers and oceans, rises into the atmosphere(大气层) and falls as rain or snow in the areas that don't have enough water. ▲ When there is too much water in one place, it becomes a flood. When water is badly needed, it results in a drought(干旱). Besides, water vapour can take heat from the sun and keep our earth cool.
④ Understanding the water cycle can help us enjoy the beauty of nature, know how our earth works and find better ways to protect our earth and that is our duty.
()1. What is the main purpose of the water cycle?
A. To change water into vapour and clouds.
B. To protect earth's climate and support life.
C. To help us understand nature in a better way.
D. To explain why floods and droughts happen.
()2. 新考法 推断段落大意 What does Paragraph 2 mainly talk about?
A. When the water cycle is the most active.
B. The different forms of water on earth.
C. How the water cycle works step by step.
D. The problems caused by the water cycle.
()3. 新考法 句子还原 Which sentence should go in "▲" in Paragraph 3?
A. However, this cycle is not always perfect.
B. Without the cycle, we would face many problems.
C. As a result, we must learn to save water in our everyday life.
D. In fact, the water cycle is important in different weather conditions.
()4. 新考法 推断篇章结构 Which of the following shows the structure of the passage?

C [文章大意]本文主要介绍了水循环的定义、过程及其对维持地球气候、供应水资源和调节温度的重要作用。
1. B [解析]推理判断题。通读全文内容，并根据第一段中的“Water is important for all living things on earth.”以及第三段中的“The water cycle is important in protecting our earth's climate. It provides us with water to drink and keeps our climate healthy.”可知，水循环的主要作用是保护地球气候并维持生命。故选 B。
2. C [解析]段落大意题。根据第二段中的“The water cycle always begins with water vapour(水蒸气）. When it's hot outside, you can see clouds forming in the sky ... As water vapour rises into the sky, it cools down and becomes clouds. After that, clouds travel through the sky and fall back to the earth as rain or snow. Then, water runs through rivers and oceans and finally returns to the earth again in different forms like rainwater or snow.”可知，第二段从水蒸气开始，依次描述了云的形成、雨雪降落、水通过河流和海洋回到地球的过程，详细介绍了水循环的步骤。因此，第二段主要讲水循环是如何运作的。故选 C。
3. B [解析]句子还原题。上文“The water cycle is important in protecting our earth's climate. It provides us with water to drink and keeps our climate healthy. Water evaporates(蒸发）from rivers and oceans, rises into the atmosphere(大气层）and falls as rain or snow in the areas that don't have enough water.”阐述了水循环的调节作用（保护气候、提供饮用水、向缺水地区输送水），下文“When there is too much water in one place, it becomes a flood. When water is badly needed, it results in a drought(干旱）.”描述了没有水循环的调节作用时会出现洪水、干旱等问题。B选项“没有水循环，我们会面临许多问题”使段落逻辑连贯。故选 B。
4. A [解析]篇章结构题。通读全文可知，第一段总起，介绍水循环的基本概念；第二段介绍水循环的具体过程；第三段介绍水循环的重要性；最后一段总结水循环的意义及呼吁保护地球。因此，文章结构为“总—分—总”。故选 A。