沪外教版·英语八年级下册《Unit 7 Data safety》练习题

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本单元考点（4 个）

网络安全相关词汇情态动词must/need的用法条件状语从句（if引导）提出警告与提醒的表达

本单元练习题（27 题）

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1. 用所给内容完成句子：你的同桌想把家庭住址发布到聊天群里，你想提醒他注意信息安全。请补全句子（每空一词）：Be careful! ___ share your home address in the chat group. It ___ be unsafe. It's better to keep it private.

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2. 根据句意补全句子：If a security app ______ (find) an unknown file, it will move the file to a safe place.（发现）

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3. 完成句子，每空一词：为了保护个人数据，每个用户都______设置一个强密码；但他______不必每天更换密码，每月一次就够了。To protect personal data, every user ______ set a strong password, but he ______ change it every day. Once a month is enough.

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4. 你的好友想在公共场合连接来历不明的免费 Wi-Fi，你想提醒他注意数据安全。下列哪一句最适合用来提出警告？A. What a sunny day it is today! B. Watch out! Connecting to unknown free Wi-Fi may leak your personal data. C. I went to the library last weekend. D. How much is this T-shirt?

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5. Complete the sentences with must or needn’t. Under the school’s data-safety rules, students ___ report a lost tablet immediately. If the system has already recorded the loss, they ___ submit a second report.

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6. The app saves a backup automatically, so Mia is not required to make another copy tonight. Which sentence has the same meaning? A. Mia must make another copy tonight. B. Mia needn’t make another copy tonight. C. Mia mustn’t make another copy tonight. D. Mia needs make another copy tonight.

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7. To keep your account safe, you ___ share your password with anyone. A. mustn't B. need C. must D. needn't

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8. A secret combination of letters, numbers, and symbols that you enter to log in to an account is a ___.

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9. 写出下列网络安全相关词汇的英文：密码。

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10. 完成同一份线上问卷调查前，妈妈对小明说："You ______ share your real address on the website."（填入 mustn't，表示"千万不能"），而小明回答："I know I ______ be careful with my personal data."（填入 must，表示"必须"）。下列关于这两个情态动词的说法正确的是：A. mustn't 表示"不必"，must 表示"禁止" B. mustn't 表示"禁止/千万不要"，must 表示"必须" C. 两者都表示"不必" D. 两者都表示"必须"

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11. — Tom, could you tell me what you will do if your computer ______ a virus (病毒)? — If it ______ one, I will ask Dad to check the data safety first and then clean the system. A. gets; will get B. will get; gets C. gets; gets D. will get; will get

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12. 根据句意，补全表示条件的单词：___ you keep your password secret, your account will be safer.（如果你保密密码，你的账户会更安全。）

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13. 完成句子：你必须在离开电脑前锁屏。You ___ lock the screen before you leave the computer. 如果你想保护你的个人信息，你不需要告诉任何人你的密码。You don't ___ ___ tell your password to anyone if you want to keep your information safe.

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14. Complete the sentences with mustn’t or needn’t. The school’s data-safety rule says students are forbidden to share their login codes. You ______ share yours with anyone. The app saves every file automatically, and its guide says no extra copy is required. You ______ make another copy.

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15. A: Must I change my password every week? B: No, you ______. Once a month is enough.

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16. Complete the reminder with should and the words in brackets: You ___ (not / share) your password with anyone.

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17. 根据中文提示补全单词，完成条件状语从句：Your files may be lost i_（如果） your phone is damaged.

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18. 补全网络安全词汇：A harmful computer program that can copy itself and damage files is a computer v____.（电脑病毒）

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19. A system that helps stop unwanted access to a computer is a ___.

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20. A pop-up asks for your account password. Complete the warning with the words in brackets: ___ your password there. (enter / never)

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21. 根据句意补全单词：The safety app is already on my phone, so I n______ install it again.（不必）

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22. Tom received an email saying he won a big prize and asking him to click a link and enter his personal information. This kind of email is best described as a ______. A. firewall B. password C. phishing email D. backup

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23. 今晚，安全系统会检查一次登录。If the check ___ an unfamiliar sign-in, the system ___ the account owner before access is allowed. A. detects; will warn B. will detect; will warn C. detected; will warn D. detects; warned

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24. 完成句子（每空一词）：Tom, you ______ not tell anyone your bank card number—it's the most important piece of personal data. And you ______ not worry too much; checking your account once a week is enough.

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25. A person who tries to break into a computer system without permission is called a ___. A. hacker B. virus C. password D. firewall

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26. 数据管理员提醒：Save a copy of the access code ___（如果） you plan to change your account settings tonight. 根据中文提示补全单词。

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27. The school club needs to send a file with members’ names online. Mia changes the information into a secret code so people without permission cannot read it. What is this process called? A. encryption B. backup C. download D. username

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沪外教版·英语其他单元练习题

Unit 1 Animal protection（18题）Unit 1 Personal finance（18题）Unit 1 Learning to learn（9题）Unit 1 The Land and the People（27题）Unit 1 Learning to be（27题）Unit 1 School life（27题）Unit 2 Making friends（27题）Unit 2 Movies and plays（9题）Unit 2 Wonders of nature（18题）Unit 2 Volunteering（27题）Unit 2 Science and Discoveries（18题）Unit 2 Dream jobs（9题）

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