期末复习Unit 4 练习题 2025-2026学年 人教版八年级英语下册

**基本信息** 本单元卷以“自然奇观与科学探索”为主题，涵盖7类题型，融合永恒火焰瀑布、西藏植物研究、闽江生态等素材，适配初中英语Unit 4期末检测，全面发展语言能力与跨文化意识。 **题型特征** |题型|题量/分值|知识覆盖|命题特色| |----|-----------|----------|----------| |阅读理解|5题|自然现象描述、细节推理|以永恒火焰瀑布为情境，考查信息定位与逻辑分析（思维品质）| |完形填空|10题|科学研究词汇、语法应用|融入西藏植物新发现，培养语篇理解与科学探究精神（学习能力）| |短文填词|10空|地理知识、动词时态|结合闽江生态保护，考查语言运用与环保意识（文化意识）| |小练笔|1题|黄河地理特征|任务驱动式写作，整合知识梳理与表达能力（语言能力）|

Unit 4 The Wonders of Nature 一、阅读理解 Have you ever heard of the Eternal Flame Falls（永恒火焰瀑布）? It's one of the most special waterfalls on our planet. The waterfall is in a park in western New York, the USA. As we come close to it, we will smell something like bad eggs.That's the smell of natural methane gas（沼气）produced by ancient rocks that are awfully hot. At the heart of the waterfall is a small flame. The burning flame has been there for a long time. The locals believe it was created by elves（精灵）.According to them,we may come across one while looking at the flame if we are lucky enough. Another popular idea about the flame is that it's alive because of the natural gas. It is widely believed that it was first set on fire a hundred years ago. Although the flame once went out, it was lit again right away. However,Indiana University researchers think differently. The temperature ofthe flame is much higher than the boiling point of water, but their study shows that those rocks are not hot enough to lead to such a result. This means something else keeps the flame alive. However, the researchers are unable to discover the real reason behind it. Arndt Schimmelmann from the university further explains that this special place has a different way to produce gas.“If there is another way of producing gas, there might be more gas sources（来源）than expected,"he adds. ( ) .What makes the waterfall smell bad? A.Water pollution. B.The methane gas. C.The small flame. D.Bad eggs. ( )2.Which of the following is True about the flame? A.It burns things that get close. B.It has been burning for long. C. It was created by an animal. D. It has never gone out. ( )3. What does the underlined word “one”refer to? A.The local people. B.The flame. C.The elf. D.The waterfall. ( )4.The fifth paragraph is mainly about A.why the rocks are so hot B.what keeps the flame alive C.some different opinions on the burning flame D. the result of a research done by a university ( )5.What's the purpose of the text? A. To talk about the cause of the flame. B. To call on people to protect the environment. C. To ask people to visit the Eternal Flame Falls. D. To introduce some special waterfalls to visitors 二、完形填空 Wu Xuexue is a young scientist who studies plants in Tibet. She works at the Chinese Academy of Sciences and is trying to uncover the secrets of 1 plants survive there. Her job is to study different kinds of plants, record their DNA and find safe ways to use medicinal plants without 2 the environment. In August 2024, Wu and her team were doing some research in Medog County when they 3 a small plant growing between rocks at 800 meters above sea level. After 4 study and DNA checking, they realized it was a completely new genus（种类） and named it Paramicrotoena（藏唇花属）.This discovery helped scientists better understand plant types and showed China's important role in 5 protection. Wu said that over the years, Tibet has made great 6 to protect its environment. 7 47 nature reserves （保护区）,the area now has its first seed bank, which keeps more than 8,400 seed samples（样本）safe．“All these help young scientists like me do our work with better tools 8 more confidence," she said. She also 9 thanks to the local Tibetan people who helped her team, including drivers, guides and villagers.Most 10 ,Wu said,"The local people treated us like family. They shared food, showed us the way and encouraged us.That trust is what makes our work possible.” ( )1.A.how B.when C.where ( )2.A.harming B.decorating C.improving ( )3.A.created B.invented C.discovered ( ) 4.A.easy B.careful C.perfect ( )5.A.child B.water C.nature ( )6.A.efforts B.mistakes C.differences ( ) 7.A.Between B.Without C.Besides ( )8.A.or B.and C.but ( ) 9.A.expressed B.refused C.accepted ( )10.A.sadly B.importantly C.unfairly 2024级八年级下期末复习 三、单项选择 1 学科网（北京）股份有限公司 ( )1.Don't throw objects from the high buildings. Even a small object may cause injuries or A.depth B.death C.degree ( )2.Tom always feels about natural wonders, so he often reads books about them. A.curious B.proud C.shocked ( )3. It's amazing that China built the world's longest expressway tunnel（高速公路隧道）under such terrible including thin air and low temperature. A.positions B.directions C.conditions ( )4.With great effort, the astronauts overcame many difficulties and explored the space A.simply B.naturally C.successfully ( )5.-I wonder how people in Turpan's hot desert. -Thanks to the ancient karez system（坎儿井）,they can get water easily A.survive B.risk C.behave 四、情景交际 1.A: in the world? B: It's Mount Qomolangma. 2.A: Mariana Trench? B: It's about 11,000 meters deep. 3.A: Mom, I won the first place in the singing competition! B: !I am proud of you! 五、看图写话 1.Qomolangma 2.long,China 3.long,than 4.one of,world 5.attract 1. 2. 3. 4. 5. 六、短文填词 The Min River, the mother river of Fujian Province,lies in the southeast of China. It 1. (run) gently through villages and cities, and finally enters the East China Sea. Originating from the Wuyi Mountains, this great river waters nearly half of Fujian's land, so it is also one of the 2. important symbols of Fujian culture and spirit. This river has been closely connected with local people. Long ago,people 3. (use) its water to carry goods and travel around. Even today, it is still of great help to Fujian people. It provides clean energy 4. thousands of homes and factories. Every spring, ahead of the Dragon Boat Festival, many teams come here to train for dragon boat races. This tradition has a history of thousands of years in Fujian. However,the Min River once faced serious troubles. Improper human activities,such as 5. (throw) rubbish and pouring dirty water into the river, made the water dirty and smelly. This was 6. (danger) to all kinds of fish and even human beings. Water pollution could spread quickly 7. we did nothing to stop it. 8. (lucky), the local government took strong measures to protect the river. It controlled pollution successfully and built wetand reserves near the river mouth. Now many birds and fish have 9. (return) to their homes here. The Min River still offers great support for 10. (people) daily lives. Therefore, everyone should try to protect this beautiful mother river forever. 七、小练笔：黄河地理知识知多少？(Length 长度；Features 特点） Length: Importance: Features: Problems: Solutions: 2 学科网（北京）股份有限公司 $