Unit 5 A fine balance课时4 Developing ideas 课时练习2026-2027学年外研版英语九年级上册

**基本信息** 本练习以分层递进设计覆盖Unit 5核心词汇、句型及语篇应用，通过基础记忆→技能应用→综合拓展的路径强化语言能力，融入雨林保护情境提升思维品质与文化意识。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础认知层|单词、词组默写|通过音标/中文提示强化核心词汇（如logging, solar panel），夯实语言基础| |技能应用层|句型补全、语法填空、单选|结合非谓语、被动语态等语法点（如be used in），训练词汇在语境中的准确运用| |综合拓展层|翻译、阅读、完形、补全对话|以雨林保护为主题（如Kelvin发明监测装置），通过语篇理解与表达提升跨情境语言应用能力，渗透环保意识|

2026-2027学年外研版九年级上 Unit 5 A fine balance 课时4 Developing ideas 部分课时练习 一、单词默写（根据音标或中文写出英文单词） 1. ________ /ˈlɒɡɪŋ/ n. 伐木 2. ________ /əˈlɑːm/ n. 警报，警报器 3. ________ /ˈreɪnfɒrɪst/ n. 雨林 4. ________ /ɪˈliːɡl/ adj. 非法的 5. ________ /ˈmaɪkrəfəʊn/ n. 麦克风，话筒 6. ________ /ˈsəʊlə/ adj. 太阳的 7. ________ /spiːʃiːz/ n. 物种 8. ________ /ɪkˈspɪəriəns/ n. 经历，体验 二、词组默写（根据中文写出英文词组） 1. 砍伐树木 __________________________ 2. 违反法律 __________________________ 3. 对环境造成巨大伤害 __________________________ 4. 超过一半的物种 __________________________ 5. 为……腾出更多空间 __________________________ 6. 太阳能板 __________________________ 三、根据要求完成句子（用所给中文提示补全英文句子，每空一词） 1. 有些伐木是违法的，对环境造成巨大伤害。 Some logging is ______ the law and does great harm to the environment. 2. 雨林是地球上超过一半物种的家园。 Rainforests are ______ to more than half of the species on the earth. 3. 农民砍伐树木为他们的动物腾出更多空间。 Farmers cut down trees to make more ______ for their animals. 4. 他的发明使用旧手机、太阳能板和麦克风。 His invention uses an old phone, a solar ______ and a microphone. 5. 森林守卫员找到了伐木者并阻止了非法伐木。 The forest guards found the loggers and ______ the logging. 四、用括号内所给词的适当形式填空 1. The invention has saved over 2,500 square kilometres of rainforests from ______ (cut) down. 2. It is often difficult ______ (notice) logging in rainforests. 3. The app on the mobile phone starts ______ (listen) when it is turned on. 4. The device sends an alarm when it ______ (hear) the sound of cutting. 5. This technology is now ______ (use) in over 20 countries. 五、单项选择 ( )1. Some logging is against the law and does great harm ______ the environment. A. for B. to C. with D. at ( )2. Rainforests are home to more than half of the species ______ the earth. A. in B. at C. on D. by ( )3. Farmers cut down trees to make more space ______ their animals. A. for B. of C. with D. from ( )4. The device uses an old phone, a solar panel and a ______. A. microphone B. telescope C. microscope D. telephone ( )5. When the app ______ the sound of cutting, it sends an alarm. A. sees B. hears C. feels D. touches ( )6. The invention is now used in over 20 ______. A. cities B. towns C. countries D. villages ( )7. Rainforests are often ______ the "lungs of the earth". A. call B. calls C. called D. calling ( )8. The device is ______ to trees so that it can monitor the forest. A. tied B. tied up C. attached D. attached to ( )9. Logging is often hard to notice in rainforests ______ the sounds from animals can be louder. A. so B. because C. but D. unless ( )10. It is our responsibility ______ protect the rainforests for future generations. A. of B. to C. for D. with 六、将下列汉语句子翻译成英文 1. 非法伐木对雨林造成了巨大伤害。   2. 雨林是地球上超过一半物种的家园。   3. 这个装置被安装在树上，监测森林的动静。   4. 当装置听到砍伐树木的声音时，它会发出警报。   5. 这项发明已经在20多个国家使用，拯救了大面积的雨林。   七、阅读理解 A    Rainforests are some of the most important ecosystems on Earth. They cover only about 6% of the earth's surface, but they are home to more than half of all plant and animal species. This makes them incredibly valuable for biodiversity. Rainforests are often called the "lungs of the earth" because they absorb carbon dioxide and produce oxygen. They also help regulate the global climate by absorbing large amounts of heat. Without rainforests, the earth would be much warmer. Despite their importance, rainforests are disappearing at an alarming rate. Illegal logging, farming, and mining are the main causes of deforestation. In 2021, about 37,500 square kilometres of rainforests were lost. This is a serious problem that affects all of us. We must take action to protect rainforests. This includes supporting sustainable practices, reducing our consumption of products that cause deforestation, and raising awareness about the importance of these ecosystems. ( )1. What percentage of the earth's surface do rainforests cover? A. About 2%. B. About 6%. C. About 16%. D. About 26%. ( )2. Why are rainforests called the "lungs of the earth"? A. They produce food for animals. B. They absorb carbon dioxide and produce oxygen. C. They provide shelter for humans. D. They are very large. ( )3. How much rainforest was lost in 2021? A. About 25,000 sq km. B. About 37,500 sq km. C. About 50,000 sq km. D. About 75,000 sq km. ( )4. What are the main causes of deforestation? A. Natural disasters and climate change. B. Illegal logging, farming, and mining. C. Tourism and development. D. Animal activities. ( )5. What does the author suggest we should do? A. Cut down more trees for farming. B. Stop all logging completely. C. Support sustainable practices and raise awareness. D. Move people out of rainforest areas. B    When he was 17 years old, a teenager named Kelvin from Indonesia invented a device to help protect rainforests. He was inspired by the illegal logging that was happening near his village. Every year, large areas of forest were being cut down, and the animals were losing their homes. Kelvin's invention is a small device that is attached to trees. It contains a microphone, a solar panel, and a mobile phone chip. When the device hears the sound of a chainsaw, it sends an alert to the forest rangers. The rangers can then quickly find the loggers and stop them. Kelvin's invention was very successful. It has been used in several countries and has saved thousands of hectares of forest. Kelvin has received many awards for his work. He said, "I just wanted to protect the forest that I grew up in. I never thought my invention would help so many people." Kelvin's story shows that young people can make a big difference in protecting the environment. His creativity and determination have inspired many others to find solutions to environmental problems. ( )6. Where is Kelvin from? A. Brazil. B. Indonesia. C. Malaysia. D. Thailand. ( )7. What inspired Kelvin to invent the device? A. A school project. B. Illegal logging near his village. C. A science competition. D. His teacher's suggestion. ( )8. What does Kelvin's device do? A. It plants new trees. B. It hears chainsaw sounds and sends alerts. C. It monitors animal movements. D. It measures rainfall. ( )9. What happened after Kelvin's invention was used? A. The forests were completely destroyed. B. Thousands of hectares of forest were saved. C. The loggers started using louder chainsaws. D. The invention was forgotten. ( )10. What message does Kelvin's story convey? A. Only adults can protect the environment. B. Young people can make a big difference. C. Technology is always harmful. D. We should not use technology in forests. C    Technology is often blamed for environmental problems, but it can also be part of the solution. In recent years, many innovative technologies have been developed to help protect ecosystems and conserve biodiversity. One example is the use of drones (无人机) to monitor forests. Drones can fly over large areas and detect illegal logging or wildfires. They can reach places that are difficult for humans to access. This allows for faster and more effective conservation efforts. Another example is the use of satellite imagery (卫星图像) to track deforestation. Scientists can analyse satellite images to see where forests are being cleared. This information helps governments and organisations take action to protect threatened areas. There are also technologies that help track and protect endangered species. GPS collars (GPS追踪项圈) are used to monitor the movements of animals like elephants and tigers. This helps scientists understand their behaviour and protect them from poachers (偷猎者). Of course, technology is not a perfect solution. It requires funding and expertise. However, when used wisely, technology can be a powerful tool for protecting the environment and ensuring a sustainable future. ( )11. What is the main idea of the passage? A. Technology is always harmful to the environment. B. Technology can be used as a tool for conservation. C. Only drones can help protect forests. D. We should not use technology in nature. ( )12. What can drones do for forest conservation? A. Plant new trees. B. Monitor large areas and detect illegal activities. C. Track animals. D. Measure air quality. ( )13. How do scientists use satellite imagery? A. To take pictures of animals. B. To track deforestation. C. To find new species. D. To measure tree height. ( )14. What is one limitation of using technology for conservation? A. It is always 100% effective. B. It is free and easy to use. C. It requires funding and expertise. D. It does not work in forests. ( )15. What does the author conclude about technology and conservation? A. Technology cannot help the environment. B. We should not use technology in conservation. C. Technology can be a powerful tool when used wisely. D. Only governments should use technology. 八、完形填空（阅读下面的短文，从每题所给的A、B、C、D四个选项中选出最佳选项） Rainforests are home to more than half of the world's (1) ______. They are also important for climate regulation. (2) ______, rainforests are disappearing quickly. Every year, large areas are cut down for farming and (3) ______. This is a serious problem. However, there is hope. Technology can help protect rainforests. One inventor (4) ______ a device that can detect illegal logging. The device is (5) ______ to trees. It has a microphone that listens for chainsaw sounds. When it (6) ______ a sound, it sends an alert to forest guards. The guards can then (7) ______ the loggers. This invention has been very (8) ______. It has saved thousands of square kilometres of rainforest. It is now used in many (9) ______ around the world. It shows that with creativity and hard work, we can (10) ______ environmental problems. ( )1. A. animals B. species C. plants D. trees ( )2. A. However B. Because C. Therefore D. Unless ( )3. A. farming B. logging C. building D. traveling ( )4. A. bought B. sold C. created D. borrowed ( )5. A. attached B. added C. taken D. sent ( )6. A. hears B. sees C. touches D. feels ( )7. A. help B. stop C. follow D. meet ( )8. A. expensive B. successful C. dangerous D. unusual ( )9. A. cities B. countries C. towns D. villages ( )10. A. solve B. create C. ignore D. forget 九、补全对话（从 A-G 七个选项中选出五个填入对话空缺处，使对话完整流畅） Li Wei: Hi, Chen Lin! Have you heard about the invention that helps protect rainforests? Chen Lin: No, I haven't. (1) ______ Li Wei: It's a device that is attached to trees. It can detect the sound of illegal logging. Chen Lin: (2) ______ How does it work? Li Wei: It has a microphone that listens for chainsaw sounds. When it hears one, it sends an alert to the forest guards. Chen Lin: (3) ______ Li Wei: Yes, very. It has been used in several countries and has saved thousands of square kilometres of rainforest. Chen Lin: That's amazing! (4) ______ Li Wei: A young inventor from Indonesia created it when he was only 17 years old. Chen Lin: Wow! (5) ______ Li Wei: I agree. It shows that young people can make a big difference in protecting the environment. A. That's really impressive! B. Who invented it? C. Where can I buy one? D. Tell me more about it. E. Is it successful? F. I think it's too expensive. G. What is it? (1) ________ (2) ________ (3) ________ (4) ________ (5) ________ 参考答案 一、单词默写 1. logging 2. alarm 3. rainforest 4. illegal 5. microphone 6. solar 7. species 8. experience 二、词组默写 1. cut down trees 2. against the law 3. do great harm to the environment 4. more than half of the species 5. make more space for 6. solar panel 三、根据要求完成句子 1. against 2. home 3. space 4. panel 5. stopped 四、用括号内所给词的适当形式填空 1. being cut 2. to notice 3. listening 4. hears 5. used 五、单项选择 1. B 2. C 3. A 4. A 5. B 6. C 7. C 8. D 9. B 10. B 六、翻译句子 1. Illegal logging does great harm to the rainforests. 2. Rainforests are home to more than half of the species on the earth. 3. The device is attached to trees to monitor the forest. 4. When the device hears the sound of cutting trees, it sends an alarm. 5. This invention has been used in over 20 countries and has saved large areas of rainforest. 七、阅读理解 A篇：1. B 2. B 3. B 4. B 5. C B篇：6. B 7. B 8. B 9. B 10. B C篇：11. B 12. B 13. B 14. C 15. C 八、完形填空 1. B 2. A 3. B 4. C 5. A 6. A 7. B 8. B 9. B 10. A 九、补全对话 1. G 2. D 3. E 4. B 5. A（C和F为多余选项） 学科网（北京）股份有限公司 $