Unit 4 The Wonders of Nature Section B 2a–2e 分层训练 2025-2026学年人教版八年级英语下册

Unit 4 The Wonders of Nature Section B (2a~2e) 分层训练（2025春人教版） 【基础达标】 一、根据汉语提示填写单词 1. The ________ (侵蚀) of wind and rain has shaped the unique rock formations in the desert. 2. Many ________ (濒危的) animals depend on the rainforest for their survival. 3. The local government has taken measures to ________ (保护) the fragile ecosystem of the lake. 4. The ________ (起源) of this ancient canyon dates back to millions of years ago. 5. We should ________ (减少) plastic waste to protect the ocean and marine life. 6. The ________ (破坏) of natural habitats has caused many species to disappear. 7. Scientists are ________ (研究) the effects of climate change on polar ice caps. 8. The ________ (可持续的) development of tourism can protect natural wonders while benefiting local people. 二、用所给词的适当形式填空 1. By the time we arrived at the national park, the rangers ________ (already / clean) up the rubbish left by tourists. 2. When I watched the documentary, I ________ (realize) how much we have destroyed nature. 3. He ________ (not / visit) the coral reef before he read the article about its danger. 4. While the scientists ________ (study) the rare plants, they found a new species. 5. Before the government took action, the lake ________ (pollute) by nearby factories for years. 6. How many natural wonders ________ (destroy) by human activities so far? 7. She ________ (work) as a volunteer in the nature reserve for three years before she went to college. 三、根据题后要求做题（每空一词） 1. They had protected the ancient forest for 20 years by 2023. (对画线部分提问) ______ ______ had they protected the ancient forest by 2023? 2. The storm destroyed many trees in the national park. (对画线部分提问) ______ ______ many trees in the national park? 3. Tom had learned about the Great Barrier Reef before his trip. (改为一般疑问句) ______ Tom ______ about the Great Barrier Reef before his trip? 4. We can save water to protect natural resources. (改为否定句) We ______ ______ save water to protect natural resources. 5. She started to volunteer in the nature reserve five years ago. (同义句转换) She ______ ______ as a volunteer in the nature reserve for five years. 6. The natural wonder is being damaged because of human activities. (同义句转换) Human activities ______ ______ the damage of the natural wonder. 【能力提升】 四、阅读理解 阅读短文，完成下列各题。 Protecting the Great Barrier Reef The Great Barrier Reef in Australia is one of the world’s most amazing natural wonders. It is home to thousands of species of fish, coral, and other marine life. However, this precious ecosystem is in danger. Over the past few decades, the reef has been damaged by climate change, pollution, and overfishing. The rising sea temperature has caused coral bleaching, which turns the coral white and kills it. Plastic waste from humans has also harmed many marine animals that mistake it for food. Before 2010, many people didn’t realize how serious the problem was. But now, governments, scientists, and local people are working together to protect it. They have set up protected areas, reduced fishing limits, and taught tourists how to visit the reef without damaging it. A group of students from Australia even started a campaign to raise awareness. They visited schools and gave speeches about the reef’s importance. By 2024, they had educated over 10,000 young people. Protecting the Great Barrier Reef is not easy, but every small action helps. We can all do our part by reducing plastic use, saving energy, and learning more about natural wonders. 任务一：根据短文内容选择正确答案 1. What is the Great Barrier Reef home to? ( ) A. Thousands of land animals B. Thousands of marine species C. Millions of trees D. Many ancient buildings 2. What has caused coral bleaching? ( ) A. Pollution from factories B. Overfishing C. Rising sea temperature D. Plastic waste 3. What did the Australian students do to protect the reef? ( ) A. They set up protected areas B. They reduced fishing limits C. They started an awareness campaign D. They cleaned up plastic waste 任务二：根据短文内容回答问题 1. What are the main causes of the Great Barrier Reef’s damage? ________________________________________________________________ 2. When did people start to realize the seriousness of the reef’s problem? ________________________________________________________________ 五、语篇填空 第一节 阅读短文，从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。每空限填一词，每词限用一次。 protect damage realize study take start raise cause depend survive The Amazon Rainforest is often called the “lungs of the earth” because it produces a lot of oxygen. Many species 1. ________ on it for their survival. However, the rainforest has been 2. ________ by deforestation and fires in recent years. Scientists have 3. ________ the rainforest for decades. They 4. ________ that if we don’t act now, many species will disappear. Before 2000, little action was 5. ________ to protect it. But now, many countries have 6. ________ working together. They have made laws to stop deforestation and 7. ________ awareness about the rainforest’s importance. Local communities also play a key role. They have 8. ________ campaigns to teach people how to live in harmony with nature. The damage 9. ________ by human activities is serious, but it’s not too late to save the rainforest. Every effort to 10. ________ it will help future generations. 第二节 阅读短文，根据语篇要求填空，使短文通顺、意思完整，每空限填一词。 Natural wonders are vital to our planet. 1. ________ we lose them, we will lose many species and break the ecological balance. The Arctic ice caps are melting fast. 2. ________ the ice melts, polar bears lose their homes and food sources. Scientists have warned that polar bears may disappear in a few decades if we don’t act. My uncle has been studying polar bears for 10 years. He says that 3. ________ he first visited the Arctic, he has seen great changes. The ice is thinner and the temperature is higher. We can all contribute to protecting natural wonders. 4. ________ example, we can use renewable energy instead of fossil fuels. 5. ________ matter how small our actions are, they can make a difference in protecting our planet’s treasures. 六、书面表达 假设你了解到一处自然奇观正面临破坏，请写一篇短文，内容包括： 1. 这处自然奇观是什么，面临什么问题； 2. 问题产生的原因； 3. 提出你的保护建议。 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 【参考答案】 基础达标 一、1. erosion 2. endangered 3. protect 4. origin 5. reduce 6. destruction 7. studying 8. sustainable 二、1. had already cleaned 2. realized 3. hadn’t visited 4. were studying 5. had been polluted 6. have been destroyed 7. had worked 三、1. How long 2. What destroyed 3. Had; learned 4. cannot 5. has worked 6. lead to 能力提升 四、阅读理解 任务一1. B 2. C 3. C 任务二1. Climate change, pollution, and overfishing. 2. After 2010. 五、 第一节1. depend 2. damaged 3. studied 4. realize 5. taken 6. started 7. raise 8. started 9. caused 10. protect 第二节1. If 2. As 3. since 4. For 5. No 六、书面表达（示例） Protecting the Coral Reefs Coral reefs, one of the most beautiful natural wonders, are facing serious damage. Many corals are dying, and marine life is losing their homes. The main causes are climate change, which raises sea temperature, and pollution from plastic waste. Tourists’ improper activities also harm the reefs. To protect them, we should reduce plastic use and choose eco-friendly products. Governments should set stricter protection laws. Tourists should follow the rules and not touch or break the corals. Let’s work together to save these precious natural treasures for future generations. 学科网（北京）股份有限公司 $