Unit 3 The Internet Discovering Useful Structures 课时作业-2025-2026学年高中英语人教版（2019）必修第二册

Unit 3 The Internet课时作业 Discovering Useful Structures (Grammar) 话题语块欣赏 1. Keep up the good work. 再接再厉。 2. Let nature take its course. 顺其自然。 3. Never underestimate your power to change yourself. 永远不要低估你改变自己的能力。 4. Though the road ahead is dangerous and difficult, we can only achieve our goals with constant efforts. 道阻且长，行则将至。 基础练 I. 单句语法填空 1. Exercise improves certain brain ________ (function), meaning you could actually exercise your way to better performance at school! 2. Make sure you have sufficient (充足的) food, water, medicine and ________ (battery) for electrical appliances. 3. The good environment and water resources have contributed much to the growth of the tea, ________ (confirm) the saying that "Longjing tea is the best tea in the world". 4. One of the reasons why people fail to get a good night's sleep is ________ (press) from school or work. 5. In 1534, Emperor Jiajing decided to build a stone complex to house imperial ________ (file), fearing they might be destroyed by fire in the wooden building of the Forbidden City. 6. The twins, who had finished their homework, ________ (allow) to play badminton on the playground. 7. This app ________ (use) several times since I downloaded it. 8. A proposal ________ (put) forward already at a recent conference that measures be taken to raise citizens' awareness of traffic safety. 9. He was very unhappy when he lost his guitar. After all, he ________ (have) it for a very long time. 10. Despite the previous rounds of talks, no agreement ________ (reach) so far by the two sides. II. 同义句转换 1. Though we don't know what was discussed, yet we can feel we have changed the topic. → Though we don't know what was discussed, yet we can feel the topic ______________. 2. Air, noise and water have affected people's health. → People's health _________________ by air, noise and water. 3. They soon put out the fire. → The fire ______________ by them. 4. They heard her sing an English song at the party. → She _________________ an English song at the party. 5. Since you have finished your work, you can have a rest now. → Since your work ______________, you can have a rest now. 6. How many cars have we made in the factory since 1990? → How many cars ______________ in the factory since 1990? 7. Look at the way I have cooked the chicken. It must taste good. → Look at the way the chicken ______________. It must taste good. 8. The Internet has moved our classes online. → Our classes ______________ by the Internet. 9. Li Ming found that they had sent his mother to hospital already. → Li Ming found that his mother ______________ to hospital already. 10. I had read half of the English novel till yesterday, and I will finish it next week. → Half of the English novel ______________ and I will finish it next week. III. 单句写作 1. (应用文佳句)在任何危险情况下，只要按下按钮，就会有人提供你所需要的帮助。(press) In any unsafe situation, simply ____________________ and someone will get you the help you need. 2. (应用文佳句)在过去的几年里，已经采取了有效的措施来保护濒危动物。(现在完成时的被动语态) In the past few years, __________________________ the endangered animals. 3. (应用文佳句)目前，汤姆和他的两个朋友已被邀请参加聚会。(现在完成时的被动语态) Tom as well as two of his friends ____________________ to the party so far. 4. (应用文佳句)自从他进入高中以来，他就被公认为榜样。(recognise) He _______________________ as a role model since he entered senior high school. 5. (应用文佳句)此功能可帮助您确认他们冗长难记的Wi-Fi密码。(confirm) This feature can help you __________________________. 培优练 Ⅰ.阅读理解 Thirteen-year-old Kaylee has a lot of friends—532, actually, if you count up her online friends. And she spends a lot of time with them. But is it possible that Kaylee’s online friendships could be making her lonely? That’s what some experts believe. Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships. Could this be true? During your parents' childhoods, connecting with friends usually meant spending time with them in the flesh. Kids played Scrabble around a table, not Words With Friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other. Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of this time is spent on social media platforms(平台). In fact, in many ways, online communication can make friendships stronger, "There's definitely a positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other," says Katie Davis, co-author of The App Generation. Other experts, however, warn that too much online communication can get in the way of forming deep friendships. "If we are constantly checking in with our virtual worlds, we will have little time for our real-world friendships," says Larry Rosen, a professor at California State University. Rosen also worries that today's kids might mistake the "friends" on the social media for true friends in life. However, in tough times, you don't need someone to like your picture or share your blogs. You need someone who will keep your secrets and hold your hand. You would like to talk face to face. 1. What is the purpose of the first paragraph? A. To summarise the text. B. To tell about true friends. C. To bring up a discussion. D. To encourage online friendship. 2. What does the underlined part "in the flesh" in Paragraph 3 mean? A. In person. B. In advance. C. In any case. D. In full measure. 3. What is Katie's attitude towards online communication? A. Worried. B. Positive. C. Confused. D. Unconcerned. 4. What view does Rosen hold? A. It's wise to turn to friends online. B. It's easier to develop friendships in reality. C. Social media help people stay closely connected. D. Teenagers need focus on real-world friendships. Ⅱ.七选五 Instagram, Facebook, Twitter, Snapchat, LinkedIn ... The ways to connect with of us on social media are limitless. 1. ________ Here's what not to do. People are extremely particular when it comes to sharing pictures on social media. So, don't post pictures of people without their permission. While you may not think posting the picture is a big deal, the other person may disagree.2. ________ It will help you avoid upsetting your loved ones. Just got a new job? Bought a new car? You have got promoted? Or maybe you decided you're moving? Don't tweet or post your news to the world before sharing it with your loved ones. A love relationship largely depends on safety and security and the chance to get inside information is an important part of that. 3. ________ Social media is public. 4. ________ It's possible to accidentally hurt loved ones by oversharing. Every relationship is different, so talk to your loved ones before sharing anything you doubt may be borderline too much. Oversharing is one of several habits that destroy trust in relationships. 5. ________ If you're upset and you have the urge to post something that may come off as mean, put down your phone, computer, or tablet and express your anger in another way. It is recommended that you use social media as a tool to spread positivity, such as birthday posts or meaningful articles. A. Just ask before you do that. B. Don't view social media as only bad. C. Never use social media when you're mad. D. These signs confirm that your relationship is rock solid. E. You shouldn't be sharing private information with the world. F. In many ways, social media has made our world a better place. G. However, don't let your online life negatively affect your real life. Ⅲ. 完形填空 I went for a walk up to a local park and Chester was running about. Suddenly, two dogs appeared, attacking him. He got 1. ________ and ran off in an unfamiliar direction. I could only 2. ________ myself—it was like losing a family member. My daughter didn't sleep for three days. She just thought her pet was 3. ________. My family had almost lost 4. ________ until Erica decided to offer her services. She uses a drone (无人机) to help find lost dogs. Equipped with a hi-tech thermal imaging (热成像) camera, the drone can detect heat 5. ________ from 250 feet in the air. 6. ________, when asked to help out in a search for a 7. ________, Erica simply turned up to the dog's last known 8. ________ and set up the drone. Having found more than 160 dogs, it's proved pretty 9. ________. And it's easy to see why. Can you 10. ________ Chester running around these woods? To the naked eyes (肉眼), it's virtually impossible, but pop the thermal image up and he jumps out, 11. ________ his owner to bring him safely back home. Having saved hundreds of dogs, the method is clearly 12. ________. Erica doesn't 13. ________ for her services and instead does it for the pleasure of seeing the owners 14. ________. Erica's drone has helped create countless happy 15. ________ and is sure to make many more in the future. 1. A. concerned B. annoyed C. scared D. confused 2. A. speak for B. focus on C. turn to D. adapt to 3. A. sick B. gone C. injured D. stuck 4. A. attitude B. contact C. track D. hope 5. A. impressions B. signals C. experiments D. behaviours 6. A. Besides B. However C. Therefore D. Otherwise 7. A. family B. job C. chance D. dog 8. A. location B. company C. adventure D. arrangement 9. A. particular B. familiar C. successful D. suitable 10. A. spot B. explore C. concentrate D. rescue 11. A. forbidding B. allowing C. ordering D. warning 12. A. challenging B. improving C. working D. surviving 13. A. apply B. wish C. answer D. charge 14. A. reunited B. recognised C. requested D. admired 15. A. destinations B. solutions C. goals D. endings Ⅳ. 语法填空 Just now, I entered the website "Topic for Today". I feel 1. ________ (interest) in the report on middle school students' using cell phones. In fact, more students now come to school with cell phones. People have different 2. ________ (opinion) about this phenomenon. Some think it is convenient 3. ________ (get) in touch with others with the cell phone, which also makes you feel safe especially in time of trouble. Besides, it is enjoyable to use various functions of 4. ________ (difference) cell phones. However, 5. ________ think differently. First, the cell phone is not a must in school, 6. ________ there are some public IC phones there, 7. ________ (make) it easy to call others. Second, many students often play e-games and send e-massages with their cell phones, even in class, 8. ________ will surely have bad effects on their study. What's more, it 9. ________ (result) in a great waste of time and money. In my opinion, the cell phone is a useful tool in our daily life. But it doesn't mean we can use it 10. ________ (free) in school. Unit 3 The Internet课时作业 Discovering Useful Structures (Grammar)答案及解析 [基础练] I. 单句语法填空 1. functions 2. batteries 3. confirming 4. pressure 5. files 6. were allowed 7. has been used 8. has been put 9. had had 10. has been reached II. 同义句转换 1. has been changed 2. has been affected 3. was soon put out 4. was heard to sing 5. has been finished 6. have been made 7. has been cooked 8. have been moved online 9. had been sent 10. has been read III. 单句写作 1. press the button 2. effective measures have been taken to protect 3. has been invited 4. has been recognised 5. confirm their long and unmemorable Wi-Fi passwords [培优练] I. 阅读理解 语篇导读：本文是一篇议论文。文章讨论了青少年花费大量时间进行线上社交可能带来的影响。一些专家认为线上联系有助于保持沟通、分享感受，使友谊更牢固；另一些专家则警告过度的线上交流可能会妨碍形成深厚的友谊，挤占现实世界的交友时间，并可能让青少年误将社交媒体上的“朋友”视为真正的朋友。文章最后强调，在艰难时刻，人们需要的是能面对面交流、保守秘密、给予实际支持的朋友。 1. C 写作目的题。文章开篇以13岁的Kaylee拥有大量网友并花费大量时间与她们相处为例，第二段随即提出问题“但Kaylee的线上友谊是否可能让她感到孤独呢？”，从而引出了对线上友谊利弊的讨论。因此，第一段的目的是引出话题（bring up a discussion）。A项“总结全文”错误，文章是开头；B项“讲述真正的朋友”和D项“鼓励线上友谊”均非第一段的目的。 2. A 词义猜测题。根据划线词组所在句“During your parents' childhoods, connecting with friends usually meant spending time with them in the flesh.”以及后文的具体举例，如围坐一桌玩拼字游戏、打电话、写信等，都是在描述过去人们进行线下、面对面的交流方式。因此，“in the flesh”意为“亲自，面对面”，与“in person”同义。 3. B 观点态度题。根据第五段Katie Davis的话“There's definitely a positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,”可知，Katie认为线上交流有积极影响，让孩子们能保持持续联系，分享更多感受。因此，她的态度是积极的（Positive）。A项“担忧的”是其他专家的态度；C项“困惑的”和D项“不关心的”在文中未体现。 4. D 细节理解题。根据最后一段中Larry Rosen的观点：“If we are constantly checking in with our virtual worlds, we will have little time for our real-world friendships,” 以及 “...today's kids might mistake the 'friends' on the social media for true friends in life.” 可知，Rosen担心过度关注虚拟世界会挤占现实世界交友的时间，且孩子们可能混淆线上“朋友”与真正的朋友。他最后强调在艰难时刻需要的是能面对面交流、给予实际支持的朋友。综合来看，Rosen持有的观点是：青少年需要关注现实世界的友谊（Teenagers need focus on real-world friendships）。A、C两项与Rosen的观点相悖；B项“在现实中发展友谊更容易”文中未明确比较。 Ⅱ. 七选五 语篇导读： 本文是一篇说明文。文章介绍了在无限的社交媒体面前，我们如何做才能不让网络生活给现实生活带来负面影响。 1. G 上文"The ways to connect with of us on social media are limitless."阐述了社交媒体的好处，再结合下文"Here's what not to do."可推知，空处应介绍网络生活可能会给你带来的影响。G项"However, don't let your online life negatively affect your real life."与上文构成转折关系，起到承上启下的作用。故选G。 2. A 根据上文"While you may not think posting the picture is a big deal, the other person may disagree."以及下文"It will help you avoid upsetting your loved ones."可推断，空处内容应表示在发帖子之前应征求他人意见。A项"Just ask before you do that."符合语境，且其中的that指代上文的posting the picture。故选A。 3. D 根据上文"Just got a new job?... A love relationship largely depends on safety and security..."可知，本段主要讲的是爱情关系取决于双方的安全和保障，要让你爱的人第一个获取你的最新消息。D项"These signs confirm that your relationship is rock solid."中的These signs指代上文中的例子，语意连贯。故选D。 4. E 上文"Social media is public."介绍了社交媒体的特点；根据下文"It's possible to accidentally hurt loved ones by oversharing."可知，因为媒体的公开性，过度分享有弊端，空处内容应表示"不要和他人过度分享"。E项"You shouldn't be sharing private information with the world."承接上文，与下文构成因果关系。故选E。 5. C 根据下文"If you're upset and you have the urge to post something that may come off as mean... express your anger in another way."可知，情绪不好时，不要通过社交媒体宣泄负面情绪。C项"Never use social media when you're mad."与本段主旨一致，可作为本段的主旨句。故选C。 III. 完形填空 语篇导读： 本文是一篇记叙文。文章主要讲述了作者的狗失踪了，后来埃丽卡用无人机把他找了回来，并介绍了无人机的工作原理和取得的成功。 1. C 根据上文"Suddenly, two dogs appeared, attacking him."可知，切斯特被狗攻击，所以他是害怕了。故选C。 2. A 根据空后的myself以及下文it was like losing a family member可知，这是作者对自己说的话（speak for myself，意为“自言自语/懊恼地说”）。故选A。 3. B 根据上文"He got scared and ran off..."和"it was like losing a family member"可知，作者家的狗失踪了。故选B。 4. D 根据下文until Erica decided to offer her services可知，家人几乎要失去希望了，这时候埃丽卡提出来可以帮助。故选D。 5. B 根据上文"Equipped with a hi-tech thermal imaging(热成像) camera"可知，无人机配备了热成像相机，所以可以探测热信号。故选B。 6. C 根据下文"when asked to help out in a search... Erica simply turned up..."可知，本句话和上文是因果关系。因为热成像相机可以探测到250英尺高空的热信号，所以埃丽卡会出现在狗最后出现的位置。故选C。 7. D 根据下文"Erica simply turned up to the dog's last known..."可知，埃丽卡出现在了狗最后出现的位置，所以是在找狗。故选D。 8. A 根据语境可知，埃丽卡在狗最后出现的位置来设置无人机。故选A。 9. C 根据上文Having found more than 160 dogs可知，埃丽卡已经找到了160多条狗，所以这个方法是成功的。故选C。 10. A 根据下文"To the naked eyes(肉眼), it's virtually impossible"可知，此处指的是用肉眼看能否发现。故选A。 11. B 根据上文but pop the thermal image up and he jumps out可知，经过一系列操作，狗跳了出来，这使得狗的主人能够将狗安全地带回家。故选B。 12. C 根据上文Having saved hundreds of dogs可知，这个方法奏效了。故选C。 13. D 根据空后的for her services以及下文提到的只是为了看到那种喜悦可知，埃丽卡并没有收取费用。charge for sth 为...收费。故选D。 14. A 根据上文"To the naked eyes... but pop the thermal image up and he jumps out... bringing him safely back home."可知，狗主人安全地将狗带回家，所以此处表示狗与主人重聚。故选A。 15. D 根据上文整个故事及"bring him safely back home"可知，最后狗主人带着狗回家了，所以这是幸福的结局。故选D。 Ⅳ. 语法填空 语篇导读： 本文是一篇议论文。文章主要针对中学生带手机进校园这一现象阐述了作者及其他学生的不同看法。作者认为手机是日常生活中一个有用的工具，但这并不意味着可以在学校里自由使用。 1. interested 考查形容词。空处在系动词feel之后作表语，用来说明主语I的感受，应用-ed结尾的形容词。故填interested。 2. opinions 考查名词的数。根据空前的different可知，空处应为名词复数形式。故填opinions。 3. to get 考查非谓语动词。此处为固定句型"it be+adj. +to do sth"意为"做某事是……的"，其中it是形式主语，动词不定式是真正的主语。故填to get。 4. different 考查形容词。根据空后的cell phones为名词短语可知，此处为形容词作定语，修饰该名词短语。故填different。 5. others 考查代词。根据上文"Some think..."可知，此处指其他人的看法；作主语表示"其他人"，应用代词others。故填others。 6. because/as/since 考查连词。根据句意可知，此处引导原因状语从句，应用连词because/as/since，表示"因为"。故填because/as/since。 7. making 考查非谓语动词。此处为非谓语动词作状语，make和逻辑主语之间为主谓关系，所以应用现在分词形式。故填making。 8. which 考查定语从句。分析句子结构可知，此处引导非限制性定语从句，修饰前面整个句子，且从句中缺少主语，应用关系代词which。故填which。 9. will result 考查动词的时态。结合语境和上文will surely have bad effects on their study可知，此处描述将来发生的事情，应用一般将来时。故填will result。 10. freely 考查副词。根据副词修饰动词可知，空处作状语，修饰动词use，应用副词形式。故填freely。 第 1 页 共 6 页 学科网（北京）股份有限公司 $