Unit1知识点-B部分练习2025-2026学年沪外教版英语八年级上册

八年级英语上册Unit1知识点-B部分练习 小试牛刀 A. 选用方框中的短语填空（每个限用一次） | ecosystem engineers | destroy beaver homes | hunt beavers for fur | create wildlife habitats | pass laws to protect | 1. In the past, humans __________ to make money. 2. People also __________ for reasons like building roads. 3. Beavers are called __________ because they help improve water quality and __________. 4. In recent years, Americans __________ beavers. B. 句型转换（改为一般疑问句并作肯定或否定回答） 1. Beavers can weigh up to 70 pounds. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 2. Humans hunted beavers for their fur and meat in the past. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 3. The Endangered Species Act helped beavers return. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ C. 根据课文内容，判断下列句子是否正确，正确的写 T，错误的写 F 1. Beavers live only in North America. ( ) 2. Beavers have hand‑like front feet that make them good swimmers. ( ) 3. Human activities caused the beaver population to fall quickly. ( ) 4. Beavers are not important for the environment. ( ) 5. The conservation of beavers is a success story because their population has recovered. ( ) D. 根据课文内容，用正确的词汇完成句子 1. Beavers are __________ animals. They can weigh up to 70 __________. 2. Beavers are usually found near __________ in the wild. 3. The beaver population fell quickly as a __________ of human activities. 4. Beavers help ecosystems by storing water, improving water __________, and creating wildlife habitats. 5. It is important to __________ educating people on the importance of protecting wildlife. 配套练习 A. 单项选择（★） 从A、B、C、D中选择最佳答案。 1. Where do most beavers live? A. Asia and Africa. B. North America and Europe. C. South America and Australia. D. Antarctica. 2. What made beavers good swimmers? A. Their sharp teeth. B. Their thick fur. C. Their hand‑like front feet. D. Their large tails. 3. Why did people hunt beavers in the past? A. For their fur and meat. B. For their teeth. C. To protect buildings. D. To create wildlife habitats. 4. What did Americans do in recent years to protect beavers? A. They built more roads. B. They passed the Endangered Species Act. C. They hunted beavers more. D. They moved beavers to Asia. 5. Why is the beaver called an “ecosystem engineer”? A. Because it builds dams. B. Because it helps the environment by storing water, improving water quality, and creating habitats. C. Because it is very strong. D. Because it is hunted by humans. B. 完成句子（★★） 根据课文内容，用正确的词汇完成句子。 1. 海狸是大型动物，体重可达70磅。 Beavers are __________ animals. They can weigh up to 70 __________. 2. 过去，人类为了皮毛和肉而猎杀海狸。 In the past, humans __________ beavers for their __________ and meat. 3. 海狸被称为“生态系统工程师”。 Beavers are called “__________ __________”. 4. 它们通过蓄水、改善水质和创造野生动物栖息地来帮助生态系统。 They help ecosystems by __________ water, improving water __________, and creating wildlife habitats. 5. 继续教育人们保护野生动物及其栖息地的重要性是很重要的。 It is important to __________ educating people on the importance of protecting __________ and their habitats. 拓展思考 写一段话，介绍一种曾被列为濒危但后来得到保护的动物 写一段话（至少5句）。说明这种动物是什么、它为什么濒危、采取了什么保护措施、以及现在的状况。 使用以下表达：... was once at risk of extinction because ... People ... Thanks to ... Now ... We should continue to ... __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 参考答案与解析 小试牛刀 A 1. hunted beavers for fur 2. destroyed beaver homes 3. ecosystem engineers, create wildlife habitats 4. passed laws to protect 小试牛刀 B 1. Can beavers weigh up to 70 pounds? Yes, they can. / No, they can’t. 2. Did humans hunt beavers for their fur and meat in the past? Yes, they did. / No, they didn’t. 3. Did the Endangered Species Act help beavers return? Yes, it did. / No, it didn’t. 小试牛刀 C 1. F 2. T 3. T 4. F 5. T 小试牛刀 D 1. large, pounds 2. water 3. result 4. quality 5. continue 配套练习 A 1. B 2. C 3. A 4. B 5. B 配套练习 B 1. large, pounds 2. hunted, fur 3. ecosystem engineers 4. storing, quality 5. continue, wildlife 拓展思考（示例） The giant panda was once at risk of extinction because of habitat loss and low birth rates. People cut down bamboo forests, which are pandas’ main food source. To protect them, China established nature reserves and carried out breeding programmes. Thanks to these efforts, the panda population has increased. Now pandas are no longer endangered. We should continue to protect their habitats and prevent illegal hunting. 1 学科网（北京）股份有限公司 $