Unit4知识点 Section B 3a-3c练习 2025-2026学年人教版八年级英语下册

八年级英语下册Unit4知识点-Section B 3a-3c练习 小试牛刀 A. 用所给动词的适当形式填空（一般现在时 / 条件句） 1. The Great Barrier Reef __________ (be) one of the most amazing places to visit. 2. It __________ (take) up an area of 345,000 square kilometres. 3. If you __________ (visit) the reef, you __________ (see) the largest living structure on earth. 4. If you __________ (dive) deeper, you might even see large fish and sharks. 5. Qinghai Lake __________ (be) a salt lake in Qinghai Province, China. B. 选用方框中的短语填空（每个限用一次） | the biggest coral reef | white sand beaches | schools of colourful fish | the dream of a lifetime | photograph wildlife | 1. The Great Barrier Reef is ____________________ in the world. 2. It includes over 900 islands and ____________________. 3. You can see coral, plants, and ____________________ in the clear water. 4. For ocean lovers, visiting the reef is ____________________. 5. At Qinghai Lake, you can ____________________ such as fish and birds. C. 句型转换（改为一般疑问句并作肯定或否定回答） 1. The Great Barrier Reef is located on the northeastern coast of Australia. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 2. You can swim, dive, or snorkel in the clear water. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 3. Qinghai Lake is the largest lake in China. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 配套练习 A. 单项选择（★） 从A、B、C、D中选择最佳答案。 1. Where is the Great Barrier Reef located? A. On the northwestern coast of Australia. B. On the northeastern coast of Australia. C. In Qinghai Province, China. D. In the Atlantic Ocean. 2. How large is the Great Barrier Reef? A. 345,000 square kilometres. B. 4,340 square kilometres. C. 900 square kilometres. D. 1,000 square kilometres. 3. What can you see if you dive deeper at the Great Barrier Reef? A. Only coral and plants. B. Large fish, turtles, and sharks. C. White sand beaches. D. Islands only. 4. What is Qinghai Lake? A. A freshwater lake. B. A salt lake. C. A coral reef. D. A desert. 5. What can you do at Qinghai Lake? A. Dive and snorkel. B. Photograph wildlife, visit islands, and ride a bike or horse. C. See sharks. D. Swim with turtles. B. 完成句子（★★） 根据句子内容，用正确的词汇完成句子。 1. 大堡礁是世界上最令人惊叹的旅游地之一。 The Great Barrier Reef is one of the most __________ places to visit. 2. 它是世界上最大的珊瑚礁。 It is the __________ coral reef in the world. 3. 它占地面积345,000平方公里，包括900多个岛屿和白色沙滩。 It __________ up an area of 345,000 square kilometres and includes over 900 islands and white sand __________. 4. 如果你参观它，你会看到地球上最大的活体结构。 If you __________ it, you will see the largest living __________ on earth. 5. 青海湖是中国最大的湖泊，面积4,340平方公里。 Qinghai Lake is the largest lake in China. It is 4,340 square kilometres in __________. 拓展思考 Part 1（描述一个你想去的自然奇观） 写一段话（至少5句）。你想去哪里？它有什么特别之处？你想在那里做什么？ 使用以下表达：I would like to visit, because it is, it has, I want to, I think it will be __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 2（给朋友写一段话，推荐大堡礁或青海湖） 写一段话（至少5句）。你想推荐朋友去哪个自然奇观？为什么？ 使用以下表达：Hey, you should visit, it is located, you can, if you go, you will, don’t miss it __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 3（为什么保护自然奇观很重要？） 写一段话（至少5句）。解释珊瑚礁或湖泊面临的威胁以及保护的必要性。 使用以下表达：Natural wonders need protection because, they are home to, if we destroy them, we will lose, we should reduce pollution, everyone can help by __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 参考答案与解析 小试牛刀 A 1. is (一般现在时) 2. takes (一般现在时，第三人称单数) 3. visit, will see (if条件句，主句将来时) 4. dive (if条件句，从句一般现在时) 5. is (一般现在时) 小试牛刀 B 1. the biggest coral reef 2. white sand beaches 3. schools of colourful fish 4. the dream of a lifetime 5. photograph wildlife 小试牛刀 C 1. Is the Great Barrier Reef located on the northeastern coast of Australia? Yes, it is. / No, it isn’t. 2. Can I swim, dive, or snorkel in the clear water? Yes, I can. / No, I can’t. 3. Is Qinghai Lake the largest lake in China? Yes, it is. / No, it isn’t. 配套练习 A 1. B（广告：northeastern coast of Australia） 2. A（广告：345,000 square kilometres） 3. B（广告：large fish, turtles, and sharks） 4. B（笔记：a salt lake） 5. B（笔记：photograph wildlife, visit islands, ride a bike or horse） 配套练习 B 1. amazing 2. biggest 3. takes, beaches 4. visit, structure 5. size 拓展思考（示例） Part 1 I would like to visit the Great Barrier Reef because it is the biggest coral reef in the world. It has colourful fish and clear water. I want to snorkel and see turtles. I think it will be an unforgettable experience. Part 2 Hey, you should visit Qinghai Lake. It is located in Qinghai Province, China. You can photograph wildlife, visit islands, and ride a horse. If you go, you will see the largest lake in China. Don’t miss it! Part 3 Natural wonders need protection because they are home to many animals and plants. If we destroy coral reefs, fish will lose their homes. We should reduce pollution and stop throwing rubbish into the ocean. Everyone can help by saving water and using less plastic. Protecting nature is protecting our future. 1 学科网（北京）股份有限公司 $