Unit4 Epic engineering- Section B-同步练2025-2026学年沪外教版七年级英语下册

Unit 4 Epic engineering ⭐Section B 同步练 一、单项选择（共 10 小题，每小题 1 分，共 10 分） 从 A、B、C、D 四个选项中选出最佳答案。 ( ) 1. The Qinghai-Xizang Railway connects Xining and ______. A. Beijing B. Lhasa C. Shanghai D. Guangzhou ( ) 2. The biggest challenge in building the railway was ______. A. water shortage B. permafrost C. lack of workers D. bad weather ( ) 3. Permafrost is a type of frozen ground that remains at or below 0℃ for at least ______. A. one year B. two years C. three years D. five years ( ) 4. To solve the permafrost problem, engineers built walls to ______ the sun. A. block B. absorb C. reflect D. focus ( ) 5. Engineers built 25 special passages for ______ to cross the railway safely. A. cars B. trains C. animals D. people ( ) 6. The air in the high mountains is thin, so the ______ level is low. A. water B. oxygen C. carbon dioxide D. nitrogen ( ) 7. Engineers designed trains that can give passengers more ______. A. food B. water C. oxygen D. seats ( ) 8. Which of the following is NOT a challenge for building the Qinghai-Xizang Railway? A. permafrost B. protecting animals C. high oxygen levels D. thin air ( ) 9. The Qinghai-Xizang Railway is called an “epic road” because ______. A. it is very long and crosses many different landscapes B. it is very new C. it only goes through deserts D. it is easy to build ( ) 10. China’s first railway was built in ______. A. 1825 B. 1876 C. 1958 D. 2006 二、完形填空（共 10 小题，每小题 1 分，满分 10 分） 阅读短文，掌握其大意，从 A、B、C、D 四个选项中选出最佳选项。 The Qinghai-Xizang Railway is one of the world’s most amazing engineering works. It 1______ Xining and Lhasa, ending Xizang’s no-railway history. Work began in 1958, and it took over 50 years to 2______. The biggest challenge was 3______. Most of the railway is built on it, and the ground can break easily if it gets too 4______. Engineers invented ways to solve this, such as building walls to 5______ the sun and building the railway above ground like long bridges. Another challenge was to 6______ animals. The railway passes through places with many wild animals, so engineers built 25 special passages just for them. The third challenge was the 7______ air in the high mountains. Passengers may feel sick because of low oxygen levels, so engineers 8______ trains that can give passengers more oxygen. All these challenges were overcome, and the railway now travels across green rivers, along snowy mountains, by blue lakes, and through amazing deserts. It is truly an epic road. It shows Chinese engineers’ creativity and hard work, and it has 9______ people’s lives better by connecting cities and regions. The Qinghai-Xizang Railway is not just a railway; it is a symbol of progress and human achievement, proving that even the most difficult challenges can be 10______. ( ) 1. A. connects B. separates C. builds D. destroys ( ) 2. A. start B. complete C. stop D. design ( ) 3. A. water shortage B. permafrost C. lack of workers D. bad weather ( ) 4. A. cold B. warm C. wet D. dry ( ) 5. A. absorb B. block C. reflect D. focus ( ) 6. A. feed B. protect C. hurt D. catch ( ) 7. A. thick B. thin C. dirty D. clean ( ) 8. A. destroyed B. designed C. sold D. bought ( ) 9. A. made B. kept C. stayed D. left ( ) 10. A. ignored B. overcome C. forgotten D. accepted 三、阅读理解（共 5 小题，每小题 2 分，共 10 分） 阅读短文，从 A、B、C、D 四个选项中选出最佳答案。 The Qinghai-Xizang Railway: An Epic Road The Qinghai-Xizang Railway is a world wonder that connects Xining and Lhasa. It took over 50 years to build, and engineers faced many challenges. The biggest challenge was permafrost, a type of frozen ground that can break easily when warm. Engineers solved this by building walls to block the sun and using elevated tracks like bridges. Another challenge was protecting wildlife. The railway passes through areas with many wild animals, so engineers built 25 special passages for them to cross safely. The thin air in the high mountains was also a problem. Low oxygen levels can make passengers feel sick, so engineers designed trains with extra oxygen systems. Today, the railway travels across beautiful landscapes: green rivers, snowy mountains, blue lakes, and amazing deserts. It is an epic road that shows Chinese engineers’ creativity and hard work. ( ) 1. How long did it take to build the Qinghai-Xizang Railway? A. 10 years B. 20 years C. over 50 years D. 100 years ( ) 2. What is permafrost? A. A type of frozen ground that remains at or below 0℃ for at least two years B. A type of rock that is very hard C. A type of plant that grows in cold places D. A type of animal that lives in the mountains ( ) 3. How did engineers solve the permafrost problem? A. They built walls to block the sun and used elevated tracks B. They heated the ground to keep it warm C. They built the railway underground D. They used only wooden tracks ( ) 4. Why did engineers build special passages for animals? A. To let them cross the railway safely B. To keep them away from the railway C. To feed them D. To watch them ( ) 5. What problem did the thin air cause for passengers? A. They may feel sick because of low oxygen levels B. They may feel too hot C. They may have trouble sleeping D. They may feel too cold 四、词汇运用（共 10 小题，每小题 1 分，共 10 分） A. 用方框中单词的正确形式填空 connect, build, protect, solve, design 1. The Qinghai-Xizang Railway ______ Xining and Lhasa. 2. Engineers ______ walls to block the sun to solve the permafrost problem. 3. They built special passages to ______ animals. 4. Engineers ______ the problem of low oxygen levels by designing special trains. 5. The trains are ______ to give passengers more oxygen. B. 用适当的介词填空（across, along, through, by） 6. The railway travels ______ green rivers. 7. It goes ______ snowy mountains. 8. It passes ______ amazing deserts. 9. It runs ______ blue lakes. 10. The special passages let animals cross ______ the railway safely. 参考答案 一、单项选择 1-5: BBBAC 6-10: BCCAB 二、完形填空 1-5: ABBBB 6-10: BBBAB 三、阅读理解 1-5: CAAAA 四、词汇运用 1. connects 2. built 3. protect 4. solved 5. designed 2. across 7. along 8. through 9. by 10. across 学科网（北京）股份有限公司 $