2025-2026学年人教版广东八年级英语下学期周末培优作业五(Unit 4)

2025-2026学年（新人教版）广东八年级英语下学期周末培优作业五（Unit 4） 一、语法选择 Do you know the Grand Canyon in America? It is one of the 1． nature wonders in the world. It is such a wonderful place 2． a large number of tourists go there every year. Probably you have seen photos of it, but you must go there in person to feel 3． beauty. How the Grand Canyon is formed is still 4． secret for us. It has a long history. It 5． that the Colorado River made the Grand Canyon over millions of years. 6． , the river cut down through hard rocks. At the same time, the land 7． higher and higher, so the canyon we see today is very high. It's very deep, about 20 kilometers 8． the top to the bottom. And because of its height, there are different kinds of plants and 9． on both sides of the canyon. At different time of the day, the canyon's sight is different. And it is not the same in different seasons and weather. The sun rises in the morning and shines brightly in the sky and the water runs around the Canyon. You can enjoy 10． this beautiful picture of the Grand Canyon whenever you like. It will be a great trip that you will never forget. 1．A． great B． greater C． greatest 2．A． that B． what C． how 3．A． it B． itself C． its 4．A． a B． an C． the 5．A． says B． said C． is said 6．A． Slowness B． Slow C． Slowly 7．A． becomes B． became C． will become 8．A． from B． for C． of 9．A． animal B． animals C． animal's 10．A． see B． seeing C． to see 二、完形填空 Nature is full of wonders. The world has many amazing places that 1.______ us. One of the most famous wonders is the Great Barrier Reef. It lies off the coast of Australia. It is the world's largest coral reef system. The reef is made up of 2.______ of coral reefs and is home to thousands of sea animals. Another famous natural wonder is the Grand Canyon. It is in the United States. The Colorado River 3.______ the canyon for millions of years. The canyon is very deep and wide. The walls of the canyon show different 4.______ of rocks. People can learn about the earth's history by 5.______ them. The Amazon Rainforest is also a great wonder. It is the largest rainforest in the world. It has 6.______ plants and animals. Many of them are not found anywhere else on earth. The rainforest is very important 7.______ it helps to keep the earth's air clean. The Qomolangma is the highest mountain in the world. It is very 8.______. Many climbers try to climb it. It is a challenge for them. These natural wonders are 9.______. We should protect them. If we don't, we may never see them again. Let's take action to 10.______ our natural world. 1. A. surprise B. surprises C. surprising D. surprised 2. A. thousand B. thousands C. a thousand D. thousand of 3. A. cut B. cuts C. has cut D. is cutting 4. A. colors B. sizes C. shapes D. kinds 5. A. look B. looking C. looked D. to look 6. A. million B. millions C. million of D. millions of 7. A. because B. so C. but D. or 8. A. low B. high C. short D. small 9. A. dangerous B. beautiful C. useless D. common 10. A. protect B. protecting C. to protect D. protected 三 阅读理解 A Poyang Lake It's the largest freshwater lake in China. It's the second largest lake, after Qinghai Lake in China. It lies in the northern part of Jiangxi Province, China. It's 173 km long and 74 km wide. It's home to over three hundred kinds of birds. Lake Superior It's the largest freshwater lake in North America. It's the third deepest freshwater in the world, after Lake Baikal in Russia, and Lake Tanganyika in Africa. Canada and the US share it. It's 616 km long and 257 km wide. There are over 80 kinds of fish in Lake Superior. 根据材料内容选择最佳答案。 1. Poyang Lake is ______. A. the largest lake in China B. a freshwater lake C. in Qinghai Province D. in the north of China 2. Poyang Lake is a great place to ______. A. go fishing B. go boating C. watch birds D. watch stars 3. ______ is the deepest freshwater in the world. A. Poyang Lake B. Lake Superior C. Lake Baikal D. Lake Tanganyika 4. Which of the following is TRUE about Lake Superior? A. It's in South America. B. It's 257 km long. C. It's the deepest lake in the world. D. It's home to many kinds of fish. 5. What can we learn from the passage? A. The world's largest freshwater lake is in Africa. B. Lake Superior is much longer than Poyang Lake. C. Poyang Lake is much wider than Lake Superior. D. Qinghai Lake is the second largest lake in China. B According to a new study, the Amazon Rainforest may become grassland in a few years. The Amazon Rainforest is the world's biggest rainforest. It is in South America. It is so wide that it covers a little more than the half size of China!The Amazon River runs through the rainforest. It's the world's second longest river. The Amazon Rainforest covers much of Brazil. The green colour on the national flag of Brazil stands for the rainforest. However, climate change and human activities make it“sick”. Usually, the rainforest can fix itself. But now, it feels too“tired” to get better.According to the latest study, many trees there may die, and the Amazon Rainforest may turn into hot,dry grassland after a few years. Why is the Amazon“sick”? The Amazon Rainforest is one of the world's wettest places. But since 2005, three droughts have hit the rainforest. They were caused by climate change. The trees don't have enough water to grow. What's worse, as they become dry, they can easily catch fire. Besides, people cut down rainforest trees for wood. They burn the forest to make farmland.These kinds of activities have made about 17% of the rainforest disappear. The Amazon Rainforest is called“the lungs of the earth”. The rich plants there take CO₂ out of the air and make oxygen (氧气). They make more than 20% of the planet's oxygen. If the Amazon Rainforest“dies”, there will be more CO₂ and our planet will become even hotter. The Amazon Rainforest is also home to over 3million animals and plants. Many of them can't live anywhere else. They would very likely disappear. 6. What does the new study show? A. Rainforests can speed up climate change. B. The Amazon Rainforest was once grassland. C. The Amazon will have fewer trees in the future. D. Many people enjoy activities in the Amazon Rainforest. 7. What does the underlined word“droughts”mean? A. Too little rain. B. Too little snow. C. Too much rain. D. Too much fire. 8.Choose the best sentence to fill in the ▲ in the passage. A. Where is the Amazon Rainforest? B. Who lives in the Amazon Rainforest? C. How can we protect the Amazon Rainforest? D. What will happen if we lose the Amazon Rainforest? 9. Why is the Amazon Rainforest called“the lungs of the earth”? A. Because it is the coolest place on the earth. B. Because it has 17 percent of the earth's minerals. C. Because it makes over one-fifth of the earth's oxygen. D. Because people and animals can breathe more easily there. 10 What will happen if the Amazon Rainforest“dies”? A. We will feel colder. B. People will lose their lungs. C. There will be more oxygen. D. Many animals and plants will disappear. C 配对阅读。上栏是五位同学的需求，下栏是七则与自然相关的活动信息。请为每位同学匹配合适的活动。 11 Sarah wants to learn how to take good photos of natural landscapes. 12 Tom is interested in learning about the Northern Lights and how they form. 13 Lisa wants to join a trip to explore the Great Barrier Reef and see sea animals. 14 Jack wants to know how to protect coral reefs from pollution. 15 Amy wants to climb a mountain and watch the sunrise at the top. A．Landscape Photography Workshop: Learn tips for taking beautiful photos of mountains, waterfalls, and forests. Time: 2:00 pm, Saturday. B．Northern Lights Science Talk: A scientist will explain how the Northern Lights form and where to see them. Time: 4:00 pm, Friday. C． Great Barrier Reef Dive Tour: Dive into the reef to see colorful corals and sea creatures. Time: 8:00 am, Sunday. D．Coral Protection Seminar: Learn about the threats to coral reefs and how we can help protect them. Time: 3:00 pm, Thursday. E. Mountain Climbing Trip: Climb a nearby mountain and watch the sunrise from the top. Time: 5:00 am, Saturday. F. Desert Survival Class: Learn how to survive in hot desert conditions. Time: 9:00 am, Sunday. G. River Rafting Activity: Enjoy an exciting rafting trip down a fast-flowing river. Time: 10:00 am, Saturday. 四 选词填空 ，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。 they; shine; run; curious; inside; think; level; natural; explorer; until The Son Doong Cave (韩松洞) is in Vietnam. It is more than 150 metres high, about 200 metres wide and at least 6.5 kilometres long. It is famous as a(n) 1 wonder. The cave is in the heart of a national park. It remained undiscovered (未被发现的) 2 a local farmer found the small opening to the cave in 1991. He told the story of the cave to other villagers, but no one 3 it was true. Years later, a group of British 4 heard about the farmer’s story. They learned from him that there was a strong, cool wind and the sound of water coming out of the opening. These were signs showing that there was a large cave. They asked him to help 5 find the cave, but he forgot where the opening was. However, the cave attracted 6 people. In 2009, the farmer and some people finally found the cave again. They went 7 and were very surprised. They found a large underground river 8 through the cave. They also found a forest. It is 200 metres below ground 9 . It is really beautiful when the sun 10 into the cave. If you want to visit the cave, you need to cross rivers and climb up walls. How difficult it is! 五、书面表达。 在我们国家众多的河流中，长江具有举足轻重的地位。为了赞美长江，学校发起了以“长江”为主题的活动，现向全体同学征文。请根据提示写一篇短文来介绍长江。 卦 The Yangtze River Information: about 6,300 kilometres long, start from Qinghai, run into the East China Sea; its ecosystem... Importance: provide energy, food... Protection: 1~2 ways 要求：1.文中不得出现人名和校名等真实信息； 2.写作词数为80左右。 参考词汇：rare species稀有物种 The Yangtze River 2025-2026学年（新人教版）广东八年级英语下学期周末培优作业五（Unit 4）答案 一 语法选择 1---5CACAC 6---10CBABB 二、完形填空 1----5ABCAB 6---10DABBA 三 阅读理解 1---5BCCDB 6---10CADCD 11----15ABCDE 四 选词填空 1．natural 2．until 3．thought 4．explorers 5．them 6．curious 7．inside 8．running 9．level 10．shines 五、书面表达。 The Yangtze River The Yangtze River is the longest in Asia and the third longest in the world. It is about6,300 kilometres long. It starts from Qinghai and runs into the East China Sea. Many fish live here, including some rare species. This river plays a key role in our lives. It provides drinking water for humans and it is also home to different kinds of fish. We call it "mother river"with deep love. However, the river is getting dirty and we must protect it. Don't drop rubbish into it, and stop factories from pouring waste water into it. Let's work together to keep our mother river clean and beautiful! 学科网（北京）股份有限公司 $