01-Unit 2 Period 1 Reading and Thinking-【优学精讲】2025-2026学年高中英语选择性必修第一册教用课件(人教版)

该高中英语课件围绕“未来科技”主题，涵盖核心词汇（如smart homes, AI）、重点句型（it will take...before...）、将来进行时语法及科技议论文写作。通过话题引领（科技利弊）、话题佳句导入，过渡到精读课文（smart homes）分析，再以词汇拓展、语法填空等学习支架落实语基。 其亮点在于融合语言能力与思维品质培养，如精读课文通过结构分析（主旨、段落功能）和开放性讨论（smart homes优缺点）提升语篇理解与思辨能力，创意课堂中词汇（如persuade）多维度练习（短语、翻译）强化语言运用。学生能系统掌握科技话题表达，教师可借助模块式设计（自查、微练）高效实施教学。

UNIT 2 LOOKING INTO THE FUTURE 1 ［核心单词］ persuade switch distant secure remote automatic efficient preference instant command obey warning constant abnormal critical cancer potential relevant innovation available nevertheless combine occupation oppose absence advocate resist accurate 返回导航 2 ［重点短语］ switch off/on，daily routine，early on，catch fire，in this sense，keep in touch （with...），get into the best shape of 返回导航 3 ［重点句型］ 1.it will take+一段时间+before... 2.make it+adj./n.+（for sb.） to do sth. 3.as引导原因状语从句 4.the way+定语从句 ［单元语法］ 将来进行时 ［写作任务］ 科技给生活带来变化的议论文 返回导航 4 ［Positive sides］ global city 全球城市 advanced technology 先进的技术 extend people's lives 延长人们的寿命 environment-friendly energy 环保能源 bring convenience to daily life 为日常生活带来便利 make people's life easier 使人们的生活更轻松 the information technology revolution 信息技术革命 overcome all sorts of physical disabilities 克服各种各样的生理缺陷 返回导航 5 ［Negative sides］ global warming 全球变暖 make people lazy 使人们懒惰 heavy reliance on machines 过度依赖机器 返回导航 6 ［Transportation］ solar-powered cars 太阳能汽车 flying motorcycles/cars 飞行摩托车/汽车 self-driving/driverless cars 无人驾驶汽车 artificial intelligence （AI） 人工智能 返回导航 7 ［Health care］ telesurgery n. 远程手术 robotic surgery 机器人手术 health monitors 健康监测器 返回导航 8 ［Homes］ household robots 家用机器人 smart home appliances 智能家电 monitoring systems 监测系统 smart toilets 智能马桶 返回导航 9 话题佳句 1.As we look to the future， advancements in technology will continue to transform our daily lives， which makes them more convenient and efficient. 展望未来，技术进步将继续改变我们的日常生活，使它们更加便捷和高效。 2.With the rapid development of renewable energy sources， future generations will enjoy a cleaner and more sustainable environment. 随着可再生能源的快速发展，后代将享有一个更清洁、更可持续的环境。 返回导航 10 3.As AI continues to advance， smart home devices will become even more integrated into daily life， providing convenience for people. 随着人工智能的不断进步，智能家居设备将更加融入日常生活，为人们提供便利。 返回导航 11 Period 1 Reading and Thinking 12 1 精读课文 语篇理解 2 自查语基 知能落实 3 创意课堂 点面突破 4 课堂微练 即时检验 13 PART 01 精读课文 语篇理解 14 What does the passage mainly talk about?( ) A.The benefits of smart homes. B.The functions of smart homes. C.How smart homes work. D.Why smart homes are safe. √ 返回导航 15 future everything monitoring accidents fantasy 返回导航 16 1.How does the author introduce the topic?( ) A.By analysing some facts. B.By giving some examples. C.By asking some questions. D.By explaining some reasons. 2.What are smart homes like according to paragraph 2?( ) A.They are safe. B.They are healthy. C.They are automatic. D.They are comfortable. √ √ 返回导航 17 3.What will smart homes do when there is damage at home?( ) A.They will fix the problem. B.They will call a repairman. C.They will keep constant track of it. D.They will offer you some information. 4.What is the purpose of the passage?( ) A.To make smart homes accepted by more families. B.To demonstrate how smart homes can make life easier. C.To explain smart homes still have some shortages. D.To tell people the application of smart homes needs some time. √ √ 返回导航 18 1.However，in the not-too-distant future，we will be living in smart homes that will lock the door for us when we are away and remember to switch off the TV when we forget.（Para.1） ［分析］ 此句是复合句。主句谓语will be living是____________；that引导______从句，修饰smart homes；两个when均引导__________从句；and连接并列谓语。 ［翻译］ ___________________________________________________ _____________________________________________________________________ 将来进行时 定语 时间状语 然而，在不久的将来，我们将住进智能家居，当我们外出时，智能家居会为我们锁门；当我们忘记关电视时，智能家居会记得关闭它。 返回导航 19 2.Your lights will come on the instant you enter the door along with your favourite music or TV programmes，and you will find your dinner already prepared for you.（Para.2） ［分析］ 此句是and连接的并列句。在第一个分句中，the instant引导__________从句，意为“一……就……”；第二个分句中包含“_____________________”结构。 ［翻译］ ___________________________________________________ ______________________________________________ 时间状语 find+宾语+宾语补足语 你一进门，灯就会亮起，同时还会播放你最喜欢的音乐或电视节目，并且你会发现晚餐已经为你准备好了。 返回导航 20 3.All controls will respond to voice commands， so if you want to change your routine， you just say aloud what you want and the home system will obey.（Para.2） ［分析］ 此句是so连接的并列句。在第二个分句中，if引导__________从句，“what you want”是what引导的______从句。 ［翻译］ ___________________________________________________ _____________________________________________________________ 条件状语 宾语 所有的控制都会响应语音指令，所以如果你想改变你的日常生活习惯，你只要大声说出你想要什么，家居系统就会遵照执行。 返回导航 21 In the not-too-distant future， we will be living in smart homes that will lock the door and switch off the TV 1._____________（automatic）. These smart homes will bring us 2.________（secure）， save us energy， and provide a more comfortable environment 3._______（live） in. automatically security to live 返回导航 22 First， we will be using advanced technology every day for automatic control of just about everything in our home. Your home will learn your 4.______（day） routine and preferences， so everything will be ready for you when you get home each evening. Your lights will come on the instant you enter the door along with your favourite music or TV programmes， and you will find your dinner already prepared for you. 5.___ addition， your smart home will be monitoring your health for you every day. daily In 返回导航 23 If you start to have sleep or weight problems， it will send a 6.________（warn） to your phone. Smart toilets will be keeping constant track 7.___ your health as well. They can warn you early on if there is something 8._________（normal） or if you have a critical illness. What's more， smart homes will be able to prevent serious damage from accidents. Many of these new 9.___________（innovate） are already available and being used in some homes. Nevertheless， 10.___ will take some years before most new homes begin to use this new technology. warning of abnormal innovations it 返回导航 1.Some people think smart homes can make our life more convenient. However， aren't there any disadvantages of smart homes? ______________ 2.If you have a chance to design a smart home， how will you improve it? ______________ Open answers. Open answers. 返回导航 25 PART 02 自查语基 知能落实 26 Ⅰ.阅读词汇·识记 选出与单词对应的汉语释义 A.电线线路；线路系统 B.旋钮；球形把手 C.传感器；敏感元件 D.电器；器具 E.电的；用电的 1.knob n. 答案：B 返回导航 27 2.appliance n. 答案：D 3.sensor n. 答案：C 4.electrical adj. 答案：E 5.wiring n. 答案：A 返回导航 28 Ⅱ.核心词汇·练通 根据语境及汉语提示写出正确的单词 1.pay attention to key ________ 注意关键短语 2._________ her to see a doctor 劝说她去看医生 3._______ off your smartphone 关闭你的智能手机 4.live in a _______ area 住在一处偏远地区 5.a ______ of communication 一种交流方式 6._______ examination 常规检查 7.under the __________ of... 在……的指挥下 phrases persuade switch remote mode routine command 返回导航 29 8.______ the rules 遵守规则 obey 9.be _______ to our future 对我们的未来 至关重要 critical 10.suffer from lung _______ 患上肺癌 11.a ________ pipe 渗漏的管道 12.________ working experience 相关工作经验 13.a ________ world 一个幻想世界 14.all _________ resources 所有可用资源 15.the _________ of the building 这座建筑物的结构 cancer leaking relevant fantasy available structure 返回导航 30 Ⅲ.拓展词汇·用活 根据提示写出相应的单词 1._______ ［ˈdɪstənt］ adj.遥远的；远处的；疏远的；心不在焉的→distance n.距离；远方 2._______ ［sɪˈkjʊə（r）］ adj.安全的；安心的；可靠的；牢固的 vt.获得；拴牢；保护→security n.安全；可靠 3.__________ ［ˌɔ:təˈmætɪk］ adj.自动的→automatically adv.自动地;无意识地 distant secure automatic 返回导航 31 4._________ ［ˈɪntɪgreɪt］ vi.& vt.（使）合并；成为一体→integrated adj.各部分密切协调的；综合的 5.________ ［ɪˈfɪʃnt］ adj.效率高的；有功效的→efficiently adv.效率高地；有功效地→efficiency n.效率，效能 6.__________ ［ˈprefrəns］ n.爱好；偏爱→prefer vi.喜欢，愿意 vt.更喜欢；宁愿 7._______ ［ˈɪnstənt］ n.瞬间；片刻 adj.立即的；速食的；速溶的→instantly adv.立刻;立即 integrate efficient preference instant 返回导航 32 8.________ ［ˈwɔ:nɪŋ］ n.警告；警示；先兆→warn vt.警告；提醒；通知 vi.发出警告，发出预告 9.________ ［ˈkɒnstənt］ adj.不断的；重复的；不变的 n.常数；常量→constantly adv.不断地，经常地 10._________ ［æbˈnɔ:ml］ adj.不正常的；反常的→（反义词）normal adj.正常的;一般的 11._________ ［pəˈtenʃl］ adj.可能的；潜在的 n.潜力；可能性→potentially adv.潜在地；可能地 warning constant abnormal potential 返回导航 33 12._______ ［dɪˈtekt］ vt.发现；查明→detection n.侦查；探测→detective n.侦探 adj.刑侦的 13.__________［ˌɪnəˈveɪʃn］ n.创新；创造→innovate v.改革；创新→innovative adj.创新的;革新的 detect innovation 返回导航 34 Ⅳ.重点短语·再现 根据语境及汉语提示填入合适的短语 1.With the detox（脱瘾治疗） now finished， they've ____________（打开） their devices and they're back online. 2.________________（跟踪） your progress towards your goals can boost your motivation and help you stay focused. 3._________（在……初期） in her research， Dr. Lee discovered a cure leading to a breakthrough in cancer treatment. switched on Keeping track of Early on 返回导航 35 4.The wooden house quickly ___________（着火） when a candle was accidentally knocked over. 5._____________（从这种意义上来讲）， computers cannot replace the creative work done by teachers. caught fire In this sense 返回导航 36 Ⅴ.重点句型·呈现 根据课文语境及汉语提示补全句子 1.when引导时间状语从句 However， in the not-too-distant future， we will be living in smart homes that will lock the door for us __________________（当我们外出时） and remember to switch off the TV _______________（当我们忘记时）.（Para.1） when we are away when we forget 返回导航 37 2.动词不定式短语作后置定语 These smart homes will keep us secure， save us energy， and ______________________________________________（提供一个更舒适的居住环境）.（Para.1） provide a more comfortable environment to live in 3.the instant引导时间状语从句，意为“一……就……” Your lights will come on ____________________________（你一进门） along with your favourite music or TV programmes， and you will find your dinner already prepared for you.（Para.2） the instant you enter the door 返回导航 38 4.what引导宾语从句 All controls will respond to voice commands， so if you want to change your routine， you just say aloud _______________（你想要什么） and the home system will obey.（Para.2） what you want 5.“it will take+一段时间+before...”意为“还需要多久才……” Nevertheless， ____________________________（还需要几年才） most new homes begin to use this new technology.（Para.5） it will take some years before 返回导航 39 PART 03 创意课堂 点面突破 40 1 persuade vt.劝说；说服；使相信 【经典例句】（2022·浙江卷1月读后续写）I thought it was impossible to persuade him into accepting my views， so I didn't want to waste our time to discuss. 我认为说服他接受我的观点是不可能的，所以我不想浪费我们的时间来讨论。 返回导航 41 （1）_______________________________________________________________________________________________________ （2）_______________________________________________________________________________________________________ （3）persuade sb. of sth. that... 使某人相信…… （4）persuasion n. 说服，劝服 persuasive adj. 有说服力的，能使人信服的 返回导航 42 【单句语法填空/一句多译】 （1）（外研必修三U2）He started to ask for help from his classmates and neighbours and persuaded them __________（donate） money. to donate （2）The children did everything they could to persuade the family ___ the plan's benefits. of 返回导航 43 （3）（2022·新高考全国卷Ⅰ读后续写）成功说服大卫不要放弃越野赛之后，我欣慰地笑了。 →Successfully ______________________________________________， I smiled with relief. →Successfully _______________________________________________ ____，I smiled with relief.［读后续写之情绪描写］ persuading David not to quit the cross-country race persuading David out of quitting the cross-country race 返回导航 44 2 switch vt.转换；交换 vi.& vt.（使）改变；转变 n.开关； 转换器； 改变 【经典例句】 ①（教材P<m></m>）Or， have you ever forgotten to switch off the TV or computer? 或者，你曾经忘记过关电视或电脑吗？ 返回导航 45 ②Remember to switch on the heater if it gets cold in the evening. 如果晚上变冷的话，记得打开加热器。 （1）switch on/off 开/关（电灯、机器等） switch from...to... 从……转变为…… （2）make a switch in... 在……方面做出改变 返回导航 46 【单句语法填空/完成句子】 （1）Before boarding an airplane， passengers are required to switch ____ their mobile phones and other electronic devices. off （2）大学毕业后，她决定从金融行业转向教育行业。 After graduating from college， she decided to _______________________________________________. switch from a career in finance to one in education （3）认识到使用塑料的负面影响后，许多消费者改变了购物习惯。 Recognizing the negative impact of plastic use， many consumers ________________________________________. have made a switch in their shopping habits 返回导航 47 3 distant adj.遥远的；远处的；疏远的；心不在焉的；冷淡的 【经典例句】 ①（2022·全国甲卷）However， after I went to high school， somehow I became distant from him. 然而，在我上了高中之后，不知怎么地，我和他疏远了。 返回导航 48 ②I can recognize my house from a distance， because of its unique architecture. 我能从远处辨认出那是我家的房子，因为它的建筑风格很独特。 （1）be/become distant from... 与……保持距离 （2）distance n. 距离；远方；远处 in the distance 在远处 at/from a distance 隔一段距离；从远处 at a distance of... 在……的距离 keep sb. at a distance 对某人冷淡；与某人疏远 返回导航 49 【单句语法填空/完成句子】 （1）（外研必修三U5）The solar rays shone through the watery mass easily， and consumed all colour， and I clearly distinguished objects ___ a distance of a hundred and fifty yards. at （2）（译林必修三U2） At that moment， they felt the earth shaking beneath their feet；beyond ___ the distance， they heard the crash of falling roofs. in 返回导航 50 （3）当你独自在不熟悉的地方旅行时，与陌生人保持距离是很重要的。 ________________________________________ when you're traveling alone in unfamiliar places. It's important to keep strangers at a distance 返回导航 51 4 preference n.爱好；偏爱 【经典例句】（2022·新高考全国卷Ⅰ满分作文）If you have a preference for this program，let's meet in the radio interview room on the fourth floor. 如果你更喜欢这个节目，让我们在四楼的电台采访室见面。 （1）have a preference for... 偏爱……；更喜欢…… （2）prefer vt. 更喜欢；宁愿 prefer to do/doing... 宁愿做…… prefer （doing） A to （doing） B 与（做）B相比更喜欢（做）A prefer to do A rather than do B 宁愿做A也不愿做B 返回导航 52 【单句语法填空/一句多译】 （1）She prefers _____________（take） public transportation to work， as it's more environmentally friendly. （2）Given a choice， I prefer summer ___ winter because of the agreeable and pleasant weather. to take/taking to （3）现在有些孩子宁愿在家上网也不愿到户外锻炼。 →Nowadays some children ____________________________________ ______________________________. →Nowadays some children ____________________________________ _____________________. prefer to surf the Internet at home rather than take exercise outdoors prefer surfing the Internet at home to taking exercise outdoors 返回导航 53 5 instant n.瞬间；片刻 adj.立即的；速食的；速溶的 【经典例句】 For an instant， I hesitated before diving into the pool， but then I plunged in with confidence. 我在跳进游泳池前有一瞬间犹豫了，但随后我自信地跳了进去。 （1）for an instant 一瞬间；一会儿 in an instant 立刻；瞬间；马上 the instant （that） 一……就…… （2）instantly adv. 立刻；立即；马上 返回导航 54 【单句语法填空/完成句子】 （1）After hearing the loud noise， everyone in the room looked towards the door ___ an instant.［读后续写之动作描写］ （2）During the sports meet， it was the passionate cheers from my classmates that _________（instant） filled me with new energy. in instantly （3）消息一经宣布，人们便开始在街上庆祝。 _________________________________________， people began to celebrate in the streets. Instantly/The instant the news was announced 返回导航 55 6 command n.指令；命令；控制 vt.命令；控制 【经典例句】 First of all， having lived in China for sixteen years and having learnt English since I was a child， I have a good command of English and Chinese， which is beneficial for introducing Chinese paintings. 首先，我在中国生活了十六年，从小就开始学习英语，所以精通英语和汉语，这有助于介绍中国画。 返回导航 56 （1）be in command of... 指挥/控制…… be at sb.'s command 服从某人的支配 under sb.'s command 在……的指挥/统帅/控制下 have a good command/knowledge of... 精通…… （2）command sb.to do sth.=command that sb.（should） do sth. 命令某人做某事 返回导航 57 【补全句子/一句多译】 （1）Captain Johnson ___________________________（指挥船只）， navigating through stormy seas， and ___________________（在他的指挥下）， the crew worked tirelessly to ensure safety. was in command of the ship under his command （2）经理命令所有员工务必在周末前完成任务。 →The manager ______________________________________________ __________________. →The manager ______________________________________________ _____________________________. commanded all employees to finish the task by the end of the week commanded that all employees （should） finish the task by the end of the week 返回导航 58 7 warning n.警告；警示；先兆 【经典例句】 ①（教材P<m></m>）If you start to have sleep or weight problems， it will send a warning to your phone. 如果你开始有睡眠或体重问题，它会向你的手机发送警告。 返回导航 59 ②（2023·全国甲卷）However， Carson's theme is a more weighty warning about environmental destruction. 然而，卡森的主题是一个更有分量的关于环境破坏的警告。 warn vt.& vi. 警告；提醒；告诫 warn sb.about/of sth. 警告某人某事 _______________________________________________________________________________________________________ 返回导航 60 【单句语法填空/一句多译】 （1）（2024·北京卷）As I began designing experiments， my committee members warned me ________ the challenges I would face. about/of （2）他们警告游客不要在没有当地导游的情况下前往偏远地区，因为这可能会很危险。 →They _____________________________________ without a local guide， which could be dangerous. →They ________________________________________ without a local guide， which could be dangerous. warned tourists not to visit remote areas warned tourists against visiting remote areas 返回导航 61 8 relevant adj.有关的；有意义的 【经典例句】 ①（教材P<m></m>）For example， if a water pipe starts leaking， or if there is a short in the electrical wiring，your smart home will detect it and provide you with the relevant information. 例如，如果水管开始漏水，或电线短路，你的智能家居就会检测到它，并为你提供相关信息。 返回导航 62 ②Learning that you are about to pay a visit to a Chinese friend but confused about the Chinese customs， I am writing to inform you of some relevant details. 得知您即将拜访一位中国朋友，但对中国的习俗感到困惑，我写信告知您一些相关细节。 （1）be relevant to... 与……有关 （2）relevance n. 相关性；关联 have （no） relevance to... 和……有关/无关 （3）irrelevant adj. 不相关的，不相干的 返回导航 63 【单句语法填空/一句多译】 （1）She felt that the comments were _________（relevant） to the objectives and could mislead the team. irrelevant （2）将会有各种各样的文化活动，包括与中国文化相关的讲座。 →There will be a wide variety of cultural activities including lectures that ____________________________.（relevant adj.） →There will be a wide variety of cultural activities including lectures that _______________________________.（relevance n.）［应用文写作之活动介绍］ are relevant to Chinese culture have relevance to Chinese culture 返回导航 64 &1& “与……有关”的其他表达还有be related to、 be linked to、 have sth. to do with、 be connected with、 be associated with 等。 返回导航 65 9 in this sense 从这种意义上来讲 【经典例句】 ①Education plays a crucial role in personal development; in this sense， access to high quality education should be a priority for all governments. 教育在个人发展中起着至关重要的作用；从这种意义上来讲，所有政府都应将获得优质教育作为优先事项。 返回导航 66 ②（译林选必一U1）In its broadest sense， comfort food refers to any food that makes us feel better. 从最广泛的意义上讲，治愈系食物是指任何能让我们感觉更好的食物。 （1）make sense 讲得通；有意义 make no sense 讲不通；没有意义 make sense of 懂得；了解……的意义 （2）in a sense 在某种意义上；在某种程度上 in no sense 决不（置于句首时，句子用部分倒装） （3）There's no/little sense/point in doing sth. 做某事没有意义。 返回导航 67 【语段填空/完成句子】 （1）When we study a difficult subject， we should ______________________________（尽力去理解它）. ___________________________________（我们绝不应轻易放弃）. ________________________________________________（抱怨它有多难是没有意义的）. We should take action to overcome difficulties. try our best to make sense of it In no sense should we give up easily There's no sense in complaining about how hard it is （2）那部电影的情节太复杂，对大多数观众来说都讲不通。 The plot of that movie was so complex that ______________________________________________________. it didn't make sense/made no sense to most of the audience 返回导航 68 10 “it will take+一段时间+before...”意为“还需要多久才……” 【经典例句】（教材P<m></m>）Nevertheless， it will take some years before most new homes begin to use this new technology. 然而，要让大多数新家庭开始使用这项新技术还需要几年的时间。 返回导航 69 before作连词，用来表示从句动作发生之前的时间。 （1）强调从句动作发生在主句之前，before意为“在……之前、不等……就……”； （2）在“it+be+一段时间+before...”句型中，before意为“……之后才……”； （3）在“it+be+否定形式+long+before...”句型中，before意为“……不久就……”。 返回导航 70 【语境辨义/完成句子】 （1）It would take 500 years before a larger fleet sailed the seas.________________ （2）It wasn't long before we were surrounded by enormous sand dunes towering above us on all sides.________________ ……之后才…… ……不久就…… （3）我还没来得及开口，他就已经生气地冲出了房间。 _________________________， he had already stormed out of the room in anger.［读后续写之情绪描写］ Before I could say a word 返回导航 71 （4）过了很长一段时间我才意识到，只有相互信任我们才能与他人保持良好的关系。 _________________________ I realised that only by trusting each other can we maintain a good relationship with others. It took a long time before 返回导航 72 PART 04 课堂微练 即时检验 73 Ⅰ.品句填词 1.The marketing team is working hard to _________（说服） customers to try their new product. 2.Much to our delight， the sound of water in the ________（远处） caught our attention and drove us to the river bank. 3.China will safeguard energy s_______ by resource protection， advocating green lifestyles and consumer culture. 4.Having a __________（爱好） for running， I am looking forward to taking part in the cross-country running race. persuade distance ecurity preference 返回导航 74 5.The head teacher gave us students a w_______ not to casually throw rubbish onto the road. 6.It's believed that quantities of building materials are __________（潜在地） harmful to people's health. 7.Your ___________（创新） should be linked to our life and be able to make our life better and more convenient. 8.If you are a________ today， why not go to see the amusing film in the city cinema? arning potentially innovations vailable 返回导航 75 Ⅱ.词块运用 1.Despite living in the same city， we seem to _______________________________（彼此疏远） due to our busy schedules. be/become distant from each other 2.Research has shown that _______________________________（偏爱垃圾食品） can result in obesity. having a preference for junk food 3.To succeed in international business， it's important to __________________________________________________（精通至少一门外语）. have a good command of at least one foreign language 返回导航 76 4.___________（在某种意义上）， the novel not only reflects the author's personal experiences but also addresses broader social issues. 5._____________（一瞬间）， everyone in the room was presented with flowers， including the waiter and the piano player. In a sense In an instant 返回导航 77 Ⅲ.根据汉语提示并使用本部分句式结构完成下面的小短文 Last Friday witnessed an extraordinary activity organized by our school， whose theme was “Technology Makes Life Better”． In the morning， we set off for a technology company. 1.________________________（当我们下公共汽车的时候；when引导时间状语从句）， an engineer was there to welcome us. Following that， not only did he give us a lecture on 3D printing， but he also introduced its history， development and application in various When we got off the bus 返回导航 78 fields. After that， he showed us 2.___________________________________________（3D打印机的工作原理是什么；what引导宾语从句）. We were amazed at the magic of technology and couldn't wait to give it a try. Luckily， our group was 3.____________________（第一个被选择的；动词不定式短语作后置定语）. We designed a 3D model of a bike and then operated the printer as instructed. 4._______________________________________________（我们一看到 what the working principle of the 3D printer is the first to be chosen The instant we saw the bike gradually taking shape 返回导航 自行车逐渐成形；the instant引导时间状语从句）， we felt ourselves to be on top of the world. Definitely， this was an educational and eye-opening activity in which I was impressed with the convenience and benefits brought by technology. 返回导航 $