Unit5知识点-Lesson 4练习 -2025-2026学年冀教版英语八年级下册

八年级英语下册Unit5知识点-Lesson 4练习 小试牛刀 A. 用所给动词的适当形式填空（一般过去时 / 被动语态） 1. The word “PASTEURIZED” __________ (write) on the milk carton. 2. If something is pasteurized, it __________ (go) through a process of heating. 3. Many years ago, people sometimes __________ (get) sick when they drank milk. 4. The pasteurization process __________ (invent) by Louis Pasteur around 1864. 5. Harmful bacteria in the milk __________ (kill) by heating it to 72°C for 15 seconds. B. 选用方框中的短语填空（每个限用一次） | raise one’s glass | a toast to | go through a process | raw milk | save millions of lives | 1. Pasteurized milk has ____________________ of heating. 2. ____________________ has dangerous bacteria and germs. 3. Louis Pasteur’s work ____________________ around the world. 4. Jeremy ____________________ in the air and says, “Here’s ____________________ you, Mr Pasteur.” C. 句型转换（改为一般疑问句并作肯定或否定回答 / 改为被动语态） 1. Louis Pasteur invented pasteurization in 1864. (改为被动语态) __________________________________________________________________ 2. People heat milk to kill harmful bacteria. (改为被动语态) __________________________________________________________________ 3. Did Jeremy notice the word “PASTEURIZED” on the carton? (作肯定回答) __________________________________________________________________ 配套练习 A. 单项选择（★） 从A、B、C、D中选择最佳答案。 1. What does “pasteurized” mean? A. Milk that comes from a dairy farm. B. Milk that has gone through a heating process. C. Milk that is raw and fresh. D. Milk that is cold. 2. Why do we heat milk? A. To make it taste better. B. To kill dangerous bacteria and germs. C. To make it last longer. D. To change its colour. 3. Who invented pasteurization? A. A dairy farmer. B. Louis Pasteur. C. Jeremy’s mother. D. A French doctor. 4. When was pasteurization invented? A. Around 1864. B. Around 1900. C. Around 1800. D. Around 1945. 5. What happened to people who drank raw milk many years ago? A. They became stronger. B. They sometimes got sick or even died. C. They lived longer. D. They never got sick. B. 完成句子（★★） 根据课文内容，用正确的词汇完成句子。 1. 杰里米注意到包装上有一个大字。 Jeremy __________ a big word on the package. 2. 生牛奶含有危险的细菌和病菌。 Raw milk has dangerous __________ and __________. 3. 我们必须将牛奶加热到72摄氏度并保持15秒。 We must heat milk to 72 degrees __________ and keep it at that temperature for 15 __________. 4. 路易斯·巴斯德是一位法国微生物学家。 Louis Pasteur was a French __________. 5. 他的工作拯救了全世界数百万人的生命。 His work __________ millions of __________ around the world. C. 被动语态练习（★★） 将下列句子改为被动语态。 1. People discovered pasteurization in the 19th century. __________________________________________________________________ 2. The process kills harmful bacteria. __________________________________________________________________ 3. Jeremy raised his glass in the air. __________________________________________________________________ 拓展思考 Part 1（描述一项你知道的食品保存技术） 写一段话（至少5句）。除了巴氏消毒，你还知道哪些食品保存方法？它如何工作？为什么重要？ 使用以下表达：Another food preservation method is, it works by, this is important because, without it, we would, I think it is a great invention because __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 2（给父母写一段话，介绍巴氏消毒法的故事） 写一段话（至少5句）。你想告诉父母巴氏消毒法是如何发明的以及它的重要性。 使用以下表达：Dear Mum and Dad, do you know how milk became safe to drink? It was invented by, before that, people, now we can, I think we should thank __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 3（为什么科学发明对日常生活很重要？） 写一段话（至少5句）。以巴氏消毒法为例，解释科学发明如何保护健康、延长寿命。 使用以下表达：Scientific inventions like pasteurization are important because, they solve problems such as, before the invention, many people, thanks to this invention, we can, it shows that science __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 参考答案与解析 小试牛刀 A 1. was written (一般过去时被动语态) 2. has gone (现在完成时，表示经历) 3. got (一般过去时) 4. was invented (一般过去时被动语态) 5. were killed (一般过去时被动语态) 小试牛刀 B 1. gone through a process 2. Raw milk 3. saved millions of lives 4. raises his glass, a toast to 小试牛刀 C 1. Pasteurization was invented by Louis Pasteur in 1864. 2. Milk is heated to kill harmful bacteria. 3. Yes, he did. 配套练习 A 1. B（课文：it has gone through a process of heating） 2. B（课文：Raw milk has dangerous bacteria and germs. We must heat milk to kill them） 3. B（课文：It was Louis Pasteur, a French microbiologist） 4. A（课文：He invented the process around 1864） 5. B（课文：people sometimes got sick when they drank milk. Some even died） 配套练习 B 1. notices 2. bacteria, germs 3. Celsius, seconds 4. microbiologist 5. saved, lives 配套练习 C 1. Pasteurization was discovered in the 19th century. 2. Harmful bacteria are killed by the process. 3. Jeremy’s glass was raised in the air. 拓展思考（示例） Part 1 Another food preservation method is refrigeration. It works by keeping food at a low temperature so bacteria cannot grow quickly. This is important because without it, fresh food would spoil in one day. I think it is a great invention because it allows us to store food for weeks and reduce waste. Part 2 Dear Mum and Dad, do you know how milk became safe to drink? It was invented by Louis Pasteur, a French scientist. Before that, people sometimes got sick or died from drinking raw milk. Now we can enjoy milk without fear. I think we should thank Mr Pasteur every time we drink milk. Part 3 Scientific inventions like pasteurization are important because they solve problems that harm human health. Before the invention, many people died from diseases in milk. Thanks to this invention, we can drink milk safely every day. It shows that science can save lives and make the world a better place. We should always appreciate the work of great scientists. 1 学科网（北京）股份有限公司 $