Unit5知识点-Lesson2练习 2025-2026学年北师大版英语八年级下册

八年级英语下册Unit5知识点-Lesson2练习 小试牛刀 A. 用所给动词的适当形式填空（一般现在时 / 祈使句） 1. We need __________ (turn) off the lights when we are not in a room. 2. Please remember __________ (close) the windows when the air conditioning is on. 3. If you __________ (replace) old light bulbs with LED lights, you will save energy. 4. Everyone should __________ (do) their part to protect the environment. 5. __________ (not leave) your computer on when you are not using it. B. 选用方框中的短语填空（每个限用一次） | turn off | replace with | do our part | set the temperature | fill the dishwasher | 1. We should always __________ the lights when we leave a room. 2. It is a good idea to __________ old bulbs __________ LED ones. 3. If we all __________, we can save a lot of electricity. 4. You can save energy by __________ at a reasonable level. 5. Make sure to __________ completely before running it. C. 句型转换（改为一般疑问句并作肯定或否定回答） 1. We need to save electricity at home. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 2. Kate and Joe are talking about their electricity bill. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 3. You can replace old light bulbs with LED lights. 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. What problem are Kate and Joe talking about? A. Water pollution. B. A high electricity bill. C. Air pollution. D. Too much rubbish. 2. Which of the following is a way to save electricity according to the lesson? A. Leave the computer on all day. B. Turn off lights when not in the room. C. Keep the air conditioning on with windows open. D. Use old light bulbs. 3. What does “do our part” mean in the lesson? A. To do only what we are told. B. To take responsibility and help. C. To ignore the problem. D. To pay more money. 4. When using air conditioning in summer, you should __________. A. set the temperature very low B. leave the windows open C. set the temperature high (but comfortable) D. turn it on 24 hours a day 5. Why is it important to fill the dishwasher completely? A. To wash dishes faster. B. To save water and electricity. C. To make more noise. D. To use more soap. B. 完成句子（★★） 根据课文内容，用正确的词汇完成句子。 1. 我们不在房间时需要关灯。 We need to __________ __________ the lights when we’re not in the room. 2. 用LED灯替换旧灯泡。 __________ old light bulbs __________ LED lights. 3. 从今以后我们要尽自己的一份力。 We should __________ __________ __________ from now on. 4. 夏天使用空调时，不要把温度设得太低。 When using air conditioning in summer, don’t __________ the temperature too __________. 5. 有很多节约用电的方法。 There are a lot of __________ to __________ electricity. C. 补全对话（★★★） 根据上下文，从方框中选择合适的句子完成对话。 A. That’s a good idea. What else can we do? B. Oh dear! We’ve used so much electricity. C. And remember to fill the dishwasher completely before running it. D. First, let’s turn off lights when we leave a room. E. We can also replace old bulbs with LED lights. Kate: Look at our electricity bill. (1) ____________ Joe: We need to do something. (2) ____________ Kate: (3) ____________ Joe: (4) ____________ Kate: (5) ____________ Joe: Yes, and set the room temperature high when we use air conditioning. Every little thing helps. 拓展思考 Part 1（你在家里做的一项节约用电的事情） 写一段话（至少5句），描述你在家里做的一项节约用电的事情（比如关灯、关电脑、合理设空调温度等）。你是怎么做的？为什么这样做有用？ 使用以下表达：always, make sure, save energy, because, for example ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ Part 2（给学校的节约用电建议） 写一段话（至少5句），给你所在的学校写三条节约用电的建议。每条建议说明具体做法和好处。 使用以下表达：first, second, third, it is important to, this will help ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ Part 3（谈谈你对“do our part”的理解） 写一段话（至少5句），解释你对“do our part”这个短语的理解。为什么每个人都要尽自己的一份力？如果大家都不做，会有什么后果？ 使用以下表达：means, everyone, if nobody, together, make a difference ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ 参考答案与解析 小试牛刀 A 1. to turn（need to do） 2. to close（remember to do） 3. replace（if从句用一般现在时） 4. do（should后接动词原形） 5. Don’t leave（祈使句否定形式） 小试牛刀 B 1. turn off 2. replace, with 3. do our part 4. setting the temperature 5. fill the dishwasher 小试牛刀 C 1. Do we need to save electricity at home? Yes, we do. / No, we don’t. 2. Are Kate and Joe talking about their electricity bill? Yes, they are. / No, they aren’t. 3. Can you replace old light bulbs with LED lights? Yes, you can. / No, you can’t. 配套练习 A 1. B（对话中讨论电费高） 2. B（关灯是节电方式） 3. B（do our part意为尽己所能，承担责任） 4. C（夏天空调温度不宜设太低，设高一点但舒适） 5. B（装满洗碗机可以节约水和电） 配套练习 B 1. turn off 2. Replace, with 3. do our part 4. set, low 5. ways, save 配套练习 C 1. B 2. D 3. A 4. E 5. C 拓展思考（示例） Part 1 I always turn off the lights when I leave my room. I also make sure to turn off my computer after using it. These actions save energy because lights and computers still use electricity when they are on but not in use. For example, leaving a computer on overnight wastes a lot of power. By doing these small things, I help reduce my family’s electricity bill. Part 2 First, our school should turn off the lights in empty classrooms. Second, we should replace old light bulbs with LED lights because they use less energy. Third, teachers should remind students to turn off the computers at the end of the day. It is important to save electricity at school because it reduces pollution. This will help our school become greener. Part 3 “Do our part” means each person takes responsibility and helps in their own way. Everyone should do their part because small actions add up. If nobody saves electricity, we will waste more energy and harm the environment. Together, our small efforts can make a big difference. That is why doing our part is so important. 1 学科网（北京）股份有限公司 $