Unit 2 知识点 Lesson 3 练习 2025-2026学年北师大版八年级英语上册

八年级英语上册Unit2知识点-Lesson3练习 小试牛刀 A. 选用方框中的短语填空（每个限用一次） | use a nickname | click on advertisements | download a virus | use simple passwords | accept strangers | 1. Online, it’s safer to ____________________ instead of your real name. 2. If you ____________________, you may accidentally ____________________ onto your computer. 3. Don’t ____________________ like “1234”. Hackers can easily guess them. 4. Never ____________________ as friends on social media. B. 句型转换（改为一般疑问句并作肯定或否定回答） 1. You should use a strong password. 一般疑问句：_________________________________________________ 肯定回答：_________________ 否定回答：_________________ 2. Someone might use your personal information in the wrong way. 一般疑问句：_________________________________________________ 肯定回答：_________________ 否定回答：_________________ 3. You must keep your password secret. 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 is a good password according to the text? A. 1234 B. Your birthday C. A mix of letters, numbers and special marks D. Your name 2. Why shouldn’t you share personal information on social media? A. It is boring. B. Someone might use it in the wrong way. C. It takes too much time. D. It is against the law. 3. What should you do when shopping online? A. Click on every advertisement. B. Only shop on safe websites. C. Share your password. D. Use your real name and photo. 4. Which indefinite pronoun means “no person”? A. Someone B. Anyone C. No one D. Everyone 5. What does the text advise about meeting online friends? A. Meet them alone. B. Never meet them without a parent or teacher. C. Meet them in a secret place. D. Always meet them online. B. 完成句子（★★） 根据课文内容，用正确的词汇完成句子。 1. 不要使用像“1234”这样的简单密码。黑客很容易猜出来。 Don’t use ______ passwords like “1234”. Hackers can ______ guess them. 2. 确保你的密码包含大小写字母、数字和一些特殊符号。 Make sure your password has both small and ______ letters, numbers, and a few ______ marks. 3. 不要把你的电话号码或其他私人信息给你不认识的人。 Don’t give your phone number or other ______ information to people you don’t ______. 4. 永远不要在没有父母或老师陪伴的情况下与任何网友见面。 Never ______ anyone from the internet ______ if you don’t have a parent or teacher with you. 5. 有没有什么东西可以吃？我饿了。 Is there ______ to eat? I’m hungry. 拓展思考 写一段话（至少5句）给出三条保护自己网络安全的建议。使用 should / must / mustn’t 和至少两个不定代词（如 someone, anyone, no one, something）。 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 参考答案与解析 小试牛刀 A 1. use a nickname 2. click on advertisements, download a virus 3. use simple passwords 4. accept strangers 小试牛刀 B 1. Should I use a strong password? Yes, you should. / No, you shouldn’t. 2. Might someone use your personal information in the wrong way? Yes, someone might. / No, someone might not. 3. 一般疑问句：Must I keep my password secret? 肯定回答：Yes, you must. / 否定回答：No, you needn’t. 配套练习 A 1. C（字母、数字、特殊符号组合） 2. B（有人可能以错误方式使用） 3. B（只在安全网站上购物） 4. C（no one = 没有人） 5. B（没有父母或老师陪伴不见面） 配套练习 B 1. simple, easily 2. capital, special 3. private, know 4. meet, anywhere 5. anything 拓展思考（示例） To stay safe online, you should follow these rules. First, never tell anyone your password. Someone may use it to steal your information. Second, don’t click on advertisements. You might download a virus onto your computer. Third, don’t share personal information like your phone number or address. No one needs to know these things online. Finally, if someone asks you to meet in person, you must not go alone. Always take a parent or teacher with you. Stay safe! 1 学科网（北京）股份有限公司 $