Unit 4 Section A 1a-1d 课时提升练 2025-2026学年人教版八年级英语下册

**基本信息** 本同步练习通过基础词汇语法、语篇理解到交际应用的三级分层设计，构建从单一知识点到综合语言运用的巩固路径，适配新授课语言能力培养需求。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础层（单句填空）|名词复数、词性转换、形容词最高级等核心词汇语法|聚焦课时基础知识点，每题对应单一考点，强化记忆| |巩固层（完形/阅读）|自然奇观主题语篇理解、词汇语境应用|以主题整合知识点，完形考查上下文逻辑，阅读训练信息提取能力| |提升层（补全对话）|主题相关交际问答|创设真实对话情境，考查语言输出与实际应用能力|

Unit 4 Section A 1a-1d 课时提升练 Ⅰ、根据句意及括号内提示，填入适当单词，每空一词。 1. The surface of the Dead Sea is 416 metres ________ sea level. 2. We are amazed at the natural ________ (wonder) of the world. 3. The Sahara Desert covers about nine million square ________ (kilometre). 4. Scientists do many ________ (measure) to know the height of mountains. 5. The water ________ (surface) of the lake is very smooth today. 6. Mount Qomolangma is the ________ (high) mountain in the world. 7. The Mariana Trench is the ________ (deep) point in the ocean. Ⅱ、完形填空 阅读下面短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。 Our world is full of amazing natural wonders. They make our planet 1______ and beautiful. Many people love travelling to these famous places to enjoy their beauty. Mount Qomolangma is one of the most 2______ mountains in the world. It is 8,848.86 metres high and it is still 3 ______ a little taller every year. It is the highest point on Earth. The Sahara Desert is the world’s 4 ______ desert. It is about 9,000,000 square kilometres in 5______ . The weather there is very hot and dry, so only a few plants and animals can live there. The Dead Sea is a special lake. It is the lowest place on 6 ______ . Its surface is 416 metres below sea level. The water there has 7______ salt, so people can easily float (漂浮) on its surface. The Mariana Trench is the deepest part of the ocean. It is about 11,000 metres deep. It is dark and quiet at the 8 ______ of the trench. Only a few special sea animals can live in such a 9______ environment. These natural wonders teach us how great nature is. It is important for us to 10______ and protect our nature. 1. A. boring B. amazing C. simple D. quiet 2. A. famous B. common C. small D. cheap 3. A. getting B. turning C. taking D. making 4. A. smallest B. highest C. biggest D. deepest 5. A. height B. size C. level D. surface 6. A. space B. land C. earth D. water 7. A. little B. much C. few D. many 8. A. bottom B. surface C. level D. square 9. A. comfortable B. difficult C. safe D. relaxing 10. A. save B. waste C. pollute D. forget Ⅲ、阅读理解 There are many fantastic natural wonders on Earth. Here are four famous ones. Mount Qomolangma is the highest mountain in the world, with a height of 8,848.86 metres. Surprisingly, the mountain is still growing a little every year. The Sahara Desert is the largest desert on Earth. It is about 9,000,000 square kilometres in size. It covers a large part of North Africa. The days are hot and the nights are cold in the Sahara. The Dead Sea is not a real sea. It is a salt lake. It is the lowest place on earth. Its surface is 416 metres below sea level. Because there is too much salt in the water, people will not sink when they swim in it. The Mariana Trench is the deepest part of the ocean. It is around 11,000 metres deep. It is very dark and cold at the bottom of the trench. Only a few kinds of sea creatures can live there. 1. How high is Mount Qomolangma now? A. 8,848.43 metres. B. 8,848.86 metres. C. 9,000,000 metres. D. 11,000 metres. 2. What do we know about the Sahara Desert? A. It is the smallest desert. B. It lies in South Africa. C. It is very large in size. D. It has warm weather all year. 3. Why can people float in the Dead Sea? A. The water is very cold. B. It is below sea level. C. There is much salt in the water. D. The surface is smooth. 4. Which place is the deepest ocean point? A. Mariana Trench. B. Dead Sea. C. Sahara Desert. D. Qomolangma. 5. What is the best title for the passage? A. Famous Natural Wonders B. How to Travel on Earth C. The Highest Mountain D. Life in the Ocean Ⅳ、补全对话 根据对话情境，填入适当句子，使对话完整通顺。 A: Do you know any amazing natural wonders in the world? B: Yes, I know many of them. 1. ________________________________? A: I want to know the highest mountain in the world. B: It’s Mount Qomolangma. A: 2. ________________________________? B: It’s 8,848.86 metres high. A: That’s really high! 3. ________________________________? B: The lowest place on earth is the Dead Sea. A: Wow, it’s special. 4. ________________________________? B: It is 416 metres below sea level. A: Nature is so wonderful! I want to learn more about it. 参考答案 Ⅰ、单句填空 1. below 2. wonders 3. kilometres 4. measurements 5. surface 6. highest 7. deepest Ⅱ、完形填空 1.B 2.A 3.A 4.C 5.B 6.C 7.B 8.A 9.B 10.A Ⅲ、阅读理解 1.B 2.C 3.C 4.A 5.A Ⅳ、补全对话（答案不唯一，合理即可） 1. What do you want to know 2. How high is it 3. What’s the lowest place on earth 4. How low is it / How many metres below sea level is it 学科网（北京）股份有限公司 $