Unit 3 Section Ⅱ Discover useful structures-【金版新学案】2025-2026学年高中英语选择性必修第三册同步课堂高效讲义配套课件（人教版）

该高中英语课件聚焦直接引语和间接引语语法知识，通过环境保护主题短文导入，引导学生感知引语使用场景，再系统讲解连接词选择、人称变化、时态调整等转换规则，搭建从感知到应用的学习支架，衔接宾语从句等前置语法知识。 其亮点在于融合环境保护主题语境，以环保科学家、活动家的引语为例，提升学生语言运用能力，通过“一随主，二随宾”等口诀和“巧学活用”练习培养思维品质，知识网络与课时测评助力学习能力发展。学生能在真实语境中掌握语法，教师可高效开展语法教学与能力训练。

UNIT 3　ENVIRONMENTAL PROTECTION 主题语境：人与自然——环境保护 Section Ⅱ　Discover useful structures 内容索引 语法冲关　详析义 1 语基讲练　提能力 2 课时测评 3 语法冲关　详析义 返回 ——直接引语和间接引语 阅读以下短文，感知黑体部分，并完成练习。 语法串烧 我的发现 　　As the storm clouds gathered over the city，the environmental scientist stood at the front of the room，her voice steady yet urgent.①“The planet is in danger，” she declared.Many experts agree that if immediate action isn't taken，the damage could be permanent.②The young activist asked the crowd if they believed they could make a difference，her eyes bright with determination.③Most environmentalists told her that every small effort counts. ④“We must shift to renewable energy sources，” the seasoned expert insisted. According to many scientists，this is the only path forward.⑤“The Earth cannot afford more delay，” warned the policy maker, his tone serious，as the room fell silent. 1．加黑处①④⑤为____ _____。 2．加黑处②③为______ ___。 直接引语　 间接引语 语法知识精讲 直接引语和间接引语 直接引述别人的原话叫直接引语；用自己的话转述别人的话叫间接引语。间接引语在多数情况下构成宾语从句。 直接引语如果改为间接引语，需在连接词、人称、时态、状语、个别指示代词和动词等方面做出相应的变化。 1．连接词的选择 (1)直接引语是陈述句，变为间接引语时，常变成由that引导的宾语从句。在口语中that可以省略。 The little boy said，“I was playing with my toys when someone knocked at the door.” 小男孩说：“我正在玩我的玩具，这时有人敲门。” →The little boy said (that) he was playing with his toys when someone knocked at the door. 小男孩说，他正在玩他的玩具，那时有人敲门。 (2)直接引语是一般疑问句、选择疑问句或反意疑问句时，间接引语中用whether(...or.../...or not)或if引导。 Mother said to her daughter，“Are you satisfied with your new room？” 妈妈对她的女儿说：“你对你的新房间满意吗？” →Mother asked her daughter whether/if she was satisfied with her new room. 妈妈问她女儿是否对她的新房间满意。 (3)直接引语为特殊疑问句时，间接引语仍用原句中的特殊疑问词来引导，其余的变化遵照直接引语和间接引语之间的转换规则来进行。 “When will the sports meet be held？”he said. 他说：“什么时候举行运动会？” →He asked when the sports meet would be held. 他问什么时候举行运动会。 温馨提示　1.直接引语是陈述句时，若变为间接引语，主句中的“said to sb”常改为told sb。 2．直接引语是疑问句时，如果主句中谓语动词是said，则将其改为asked。 3．疑问句的直接引语变间接引语时，要把疑问语序变成陈述语序。 巧学活用1——将直接引语变为间接引语 ①She said，“The environment is in crisis.” →______________________________________ ②He asked，“Are we doing enough to protect the planet？” →________________________________________________ ③The activist asked，“What steps can we take to reduce waste？” →______________________________________________________ She said that the environment was in crisis.　 He asked if they were doing enough to protect the planet.　 The activist asked what steps they could take to reduce waste. 2．人称的变化 (记忆口诀)一随主，二随宾，第三人称不更新。 直接引语变为间接引语时，人称代词要根据转述人立场的变化做相应的改变。 (1)“一随主”。指在直接引语变间接引语时，如果从句中的主语是第一人称或被第一人称所修饰，从句中的人称要按照主句中主语的人称变化。 Mary said，“I want to have a computer of my own.” 玛丽说：“我想有一台自己的电脑。” →Mary said that she wanted to have a computer of her own. 玛丽说她想拥有一台自己的电脑。 (2)“二随宾”。指直接引语变间接引语时，若从句中的主语及宾语是第二人称或被第二人称所修饰，从句中的人称要跟引号外的主句的宾语一致。 Her colleague said to her，“Who did you ask for a leave？” 她的同事对她说，“你向谁请了假？” →Her colleague asked her who she had asked for a leave. 她的同事问她向谁请了假。 (3)“第三人称不更新”。指直接引语变间接引语时，如果从句中的主语及宾语是第三人称或被第三人称所修饰，从句中的人称一般不需要变化。 The workers said，“The leaders often make the workers work extra hours.” 工人们说：“领导们经常让工人们加班。” →The workers said that the leaders often made the workers work extra hours. 工人们说领导们经常让工人们加班。 巧学活用2——把下列句子变为间接引语，注意人称变化 ①“You should take better care of the environment，” he said. →______________________________________________________ ②“I will join the meeting tomorrow，” she said. →________________________________________________ ③“She is working on a new project，” John said. →___________________________________________ He told me that I should take better care of the environment.　 She said that she would join the meeting the next day.　 John said that she was working on a new project. 3．时态的变化 直接引语变间接引语时句子时态变化如下表：   直接引语 间接引语 句子时态 一般现在时 一般过去时 现在进行时 过去进行时 现在完成时 过去完成时 一般过去时 过去完成时 过去完成时 过去完成时(不变) 一般将来时 过去将来时 His friend said to him，“We are planning to have a picnic.” 他的朋友对他说：“我们计划去野餐。” →His friend told him that they were planning to have a picnic. 他的朋友告诉他说，他们计划去野餐。 The organizer said，“We have begun our plan.” 组织者说：“我们已开始了我们的计划。” →The organizer said that they had begun their plan. 组织者说，他们已开始了他们的计划。 温馨提示　在下面几种情况中，直接引语变为间接引语时，时态不发生变化。 1．直接引语是客观真理、谚语和格言时，其时态不变。 “The earth moves around the sun and the moon moves around the earth，” the teacher said to me. →The teacher told me (that) the earth moves around the sun and that the moon moves around the earth. 2．直接引语中有具体的过去某年、某月、某日作状语，变为间接引语时，时态不变。 Tom said，“I was born on April 21，1980.” →Tom said he was born on April 21，1980. 巧学活用3——把下列句子变为间接引语，注意时态变化 ①“She had already left when I arrived at the station，” he said. →________________________________________________________ ②He said，“I am reading a book about climate change because I am passionate about protecting the environment.” →______________________________________________________________________________________________________ He said that she had already left when he arrived at the station.　 He said that he was reading a book about climate change because he was passionate about protecting the environment.　 ③She said，“I go for a run every morning to stay healthy and fit.” →___________________________________________________________ ④“I will visit the museum tomorrow to learn more about ancient civilizations，” I said. →___________________________________________________________________________________ ⑤“Practice makes perfect，” my father said to me. →_________________________________________ ⑥“When did you come here？” she asked. →__________________________________ She said that she went for a run every morning to stay healthy and fit.　 I said that I would visit the museum the next day to learn more about ancient civilizations.　 My father told me that practice makes perfect.　 She asked me when I had gone there. 4．指示词、状语及动词的变化   直接引语 间接引语 指示代词 this these that those 时间状语 now today tonight yesterday tomorrow last month(week) next month(week) the day before then that day that night the day before the next/following day the month (week) before the next month(week) two days before 地点状语 here there 动词 come bring go take 巧学活用4——将直接引语改为间接引语 ①He said，“We went to the cinema yesterday.” →___________________________________________________ ②“Are you leaving today or tomorrow？” Joan asked Kate. →___________________________________________________________ ③“When you come here，will you please bring a dictionary？” the teacher said to Tom. →______________________________________________________________ He said that they had gone to the cinema the day before. Joan asked Kate if/whether she was leaving that day or the next day. The teacher asked whether Tom would take a dictionary when he went there. 5．引述祈使句通常用“动词＋宾语＋动词不定式”结构。 如果祈使句为否定句，在动词不定式的前面加上not。引述表示命令的祈使句，常用动词order，tell，warn；引述表示请求的祈使句，常用动词ask，beg；引述表示建议、劝告的祈使句，常用动词advise等。 He said，“Please come here again tomorrow.” →He asked me to go there again the next day. 他让我第二天再到那儿去。 He said，“Do have a look yourself first.” →He advised me to have a look myself first. 他建议我自己先看一看。 He said，“Don't make so much noise，boys.” →He told the boys not to make so much noise. 他叫那些男孩不要弄出那么多的噪音。 温馨提示　祈使句变间接引语，遵循“一改二变三加四去”原则： 一改：said (to)改为asked或told 二变：said to的宾语变成asked等的宾语 三加：即在动词原形前加to，使其成为动词不定式 四去：去掉please 巧学活用5——将直接引语变为间接引语 ①The teacher said to the boy，“Open the door，please！” →_____________________________________ ②His father said to him，“Don't leave the window open when you are out.” →__________________________________________________________ ③“Please explain why you're late，” the boss said. →__________________________________________ The teacher told the boy to open the door.　 His father told him not to leave the window open when he was out.　 The boss asked him to explain why he was late. 知识网络 返回 语基讲练　提能力 返回 核心词汇练全 harmonious adj.和谐的 (教材原句)...promote a harmonious relationship between man and nature，build a sustainable energy system，and advocate a moderate，green，and low-carbon lifestyle. ……促进人与自然的和谐关系，构建可持续能源体系，并且倡导一种适度、绿色和低碳的生活方式。   (1)harmony n.　 　 融洽；和谐；协调 in harmony with sb/sth 与某人/物协调；与某人/物和谐相处 out of harmony with sb/sth 与某人/物不协调 (2)harmoniously adv. 和谐地　　 1 归 纳 单句语法填空/完成句子 (1)Despite their differences，they worked ____________(harmony)，focusing on the task at hand. (2)The colors of the painting were __________(harmony)，creating a calming and balanced atmosphere. (3)The couple has always lived in harmony ____ their neighbors. (4)只有当我们学会与自然和谐相处时，我们才能停止对地球的威胁。 Only _______________________________________can we stop being a threat to our planet. harmoniously　 harmonious　 with　 when we learn to exist in harmony with nature submit vt.&vi.提交；呈递；屈服 (教材原句)According to the report submitted by researchers，between 20 and 25 percent of all annual carbon dioxide emissions are caused by the destruction of tropical forests. 根据研究人员提交的报告，每年二氧化碳排放量的20%到25%是由对热带雨林的破坏造成的。   (1)submit to...　 向……屈服/认输 submit oneself to... 顺从/屈服于…… submit...to... 把……提交给…… (2)submission n. 提交；呈递；屈服　　 2 归 纳 单句语法填空/完成句子 (1)The team refused to submit ___ the pressure，continuing to push forward with their project. (2)He was forced to submit _______(him) to a medical examination as part of the employment process. (3)The __________(submit) of the proposal was delayed due to technical issues with the system. (4)对这次夏令营感兴趣的人必须在5月15日前提交申请书和相关资料。 Those who are interested in the summer camp must ______________________ ____________________ by May 15. to　 himself　 submission　 submit the applications and relevant materials on behalf of代表(代替)某人 (教材原句)I'm doing a project on behalf of my school about global warming. 我正在代表学校做一个关于全球变暖的项目。   (1)on behalf of sb＝on sb's behalf　 代表某人 (2)represent v. 代表；象征；表示 (3)stand for 代表；象征；支持　　 3 归 纳 单句语法填空/一句多译 (1)He spoke on behalf ___ the team，thanking everyone for their hard work. (2)The lion stands ____ courage and strength in many cultures around the world. (3)我代表学生会写信邀请您下周三下午3点到5点给我们做讲座。 →____________________________，I'm writing to invite you to give us a lecture from 3：00 pm to 5：00 pm next Wednesday.(behalf) →_____________________________，I'm writing to invite you to give us a lecture from 3：00 pm to 5：00 pm next Wednesday.(represent) of　 for　 On behalf of the Student Union Representing the Student Union sensitive adj.敏感的；善解人意的；灵敏的 (教材原句)Why is nuclear power a sensitive topic？为什么核能是一个敏感话题？   (1)be sensitive to　 对……敏感 be sensitive about 介意……；在乎…… (2)sense n. 感觉；判断力；意义 vt. 感觉到 a sense of... ……感 make sense 有道理，讲得通 make sense of 理解　　 4 归 纳 单句语法填空/完成句子 (1)He is sensitive ______ his appearance and always makes sure he looks neat. (2)She is very sensitive ___ changes in temperature and often feels cold quickly. (3)He has a strong sense ___ responsibility and always completes tasks on time. (4)她试图理解这个情况，但事实太过混乱。 __________________________________，but the facts were too confusing. 返回 about　 to　 of She tried to make sense of the situation 课时测评 返回 语境基础练 Ⅰ.单句语法填空(每小题1分，共8分) 1．The teacher is sensitive ___ the students' needs，always adjusting lessons accordingly. 2．I am writing on behalf ___ my company to express our interest in your proposal. 3．The __________ (submit) of all applications must be completed by the end of this week. 4．They maintained a __________(harmony) working environment，where everyone contributed their skills and ideas. to　 of　 submission　 harmonious　 5．He asked me ___________ I would attend the meeting tomorrow. 6．My mother asked me whether I _____________(finish) my homework before I watched TV. 7．Mr. Jackson said that in most countries red ______(stand) for danger. 8．She said that she ___________ (buy) the computer two weeks before. whether/if had finished　 stands　 had bought Ⅱ.完成句子(每小题3分，共21分) 1．她问我是否会加入这个团队来做这个项目。 She asked ___________ I would join the team for the project. 2．地理老师告诉我们太阳从东方升起，从西方落下。 The geography teacher told us that ___________________________________. 3．彼得告诉我他明年要来中国。 Peter told me that __________________________________． 4．老师要求学生们在别人学习时不要打扰他们。 ___________________________________________ while they were studying. whether/if the sun rises in the east and sets in the west he would come to China the next year The teacher asked the students not to disturb others 5．在这里我很荣幸地代表学校向你们表示热烈的欢迎。 I'm honored to be here to extend a warm welcome to you _________________ _______． 6．尽管遭遇了许多挫折，他从不轻易屈服于失败，依然不断向前推进。 Despite numerous setbacks，he never easily ________________ and continues to push forward. 7．这个节日是不同文化的和谐庆典，包含了音乐、食物和艺术。 ___________________________________ of different cultures，with music，food，and art. on behalf of our school submits to failure The festival was a harmonious celebration Ⅲ.语法与语篇(每小题1分，共5分) 　　A few minutes later，the other two cyclists arrived.They were shocked to find Mac's bicycle lying on the road，his tent bag torn and Mac just like a drowned mouse. They asked anxiously 1._______________________ (到底发生了什么).Mac responded breathlessly that 2._________________________(他差点被一只狼吃掉). When told about 3._________________________(Mac经历了什么)，they couldn't help screaming out，“What a narrow escape！”“Yes，without their timely help，I would have been the food of the wolf.”Mac's friends were also thankful to Paul and Becky.Afraid that there might be more potential dangers ahead，Paul and Becky asked kindly 4._____________________________(他们是否需要搭便车). Mac and his friends answered with one voice，5.“_____________(我们乐意).” what on earth had happened　 he was almost eaten by a wolf what Mac had experienced whether/if they were in need of a lift We'd love to Ⅰ.阅读理解(每小题2.5分，共17.5分) A (2025·河南省许昌市高二上) Here are four student podcasts (播客) that offer a glimpse into the minds of students and what they say about news concerning climate in their communities—and what they hope to do about it. Behind the Scenes of the Mosquito Fire In a 10-episode series，a sixth-grade class at the Georgetown School of Innovation in Georgetown，California，shares stories from the damaging Mosquito Fire in 2022.This group of eight students asks two firefighters from the Georgetown Fire Department what it's like to fight fires and protect loved ones in their hometown. 素能提升练 Fires：Set Ablaze At Chautauqua Elementary，the Vashon fifth-graders talk about the far-reaching and lasting impact of wildfires and wildfire smoke—and the direct effects on their lives，like waiting for the school bus on a smoky day.The students also interview experts and share their research on wildfire precautions (预防措施). Flowing Through Time In this podcast from Peak Academy，a group of eight middle schoolers reports on dealing with water shortages in Bozeman，Montana.They trace the history of their growing hometown's water supply，which has been dependent on mountain snowmelt.As that source becomes less reliable in a warming world，the students turn to the grown-ups to ask what they can do to conserve water. Washed Away The deadly flooding in eastern Kentucky last year forever changed the lives of high schoolers Ryley Bowman，Carolina Johnson and Hunter Noble. The three classmates at Morgan County High School in West Liberty，Ky.，share first-hand accounts of their own and their family's experiences during the floods. 语篇解读　本文是一篇应用文。文章主要介绍了四个学生播客，他们关注自己社区的气候新闻，并分享他们的观点和希望采取的行动。 1．Who shows interest in firefighters' stories? A．Peak Academy students. B．Chautauqua Elementary students. C．Morgan County High School students. D．Georgetown School of Innovation students. 细节理解题。根据Behind the Scenes of the Mosquito Fire下“In a 10-episode series，a sixth-grade class at the Georgetown School of Innovation...to fight fires and protect loved ones in their hometown.”可知，Georgetown School of Innovation的学生对消防员的故事感兴趣。故选D。 √ 2．Which podcast shows concern for water conservation? A．Washed Away. B．Fires：Set Ablaze. C．Flowing Through Time. D．Behind the Scenes of the Mosquito Fire. 细节理解题。根据Flowing Through Time下“In this podcast from Peak Academy，a group of eight middle schoolers reports on dealing with water shortages...what they can do to conserve water.”可知，Flowing Through Time的播客关注水资源保护。故选C。 √ 3．What do Fires：Set Ablaze and Washed Away have in common? A．They consult experts' research results. B．They explore the causes of climate change. C．They share students' personal experiences. D．They discuss precautions for natural disasters. 细节理解题。根据Fires：Set Ablaze下“At Chautauqua Elementary...students also interview experts and share their research on wildfire precautions (预防措施).”和Washed Away下“The deadly flooding in eastern...accounts of their own and their family's experiences during the floods.”可知，Fires：Set Ablaze和Washed Away共同之处是他们分享学生的个人经历。故选C。 √ B (2025·福建省泉州市高二上) Some Virginia Tech researchers have developed a new method for upcycling plastics into high-value chemicals to create soaps，cleaners，and more. Plastics and soaps seemingly have little in common，but there is a surprising connection between the two on a molecular (分子的) level：The chemical structure of polyethylene—one of the most commonly used plastics—is strikingly similar to that of a fatty acid，which is used in making soap.Guoliang Liu，an associate professor of chemistry at Virginia Tech，believed the similarity meant polyethylene could be turned into fatty acids and eventually soap with a few extra steps.The challenge was how to break a long polyethylene chain (链) into many short—but not too short—chains and how to do it efficiently. Liu，along with two PhD chemistry students Zhen Xu and Eric Munyaneza，built a small，oven-like reactor where they could heat polyethylene.The lower part of the reactor reaches a high temperature to break the long chains，while the upper part is cooled to a low enough temperature to prevent further breakdown.After that，they gathered the leftover and found that Liu's assumption had been right：It was composed of “short-chain polyethylene”，or more precisely，waxes (蜡).This was the first step in developing a method for upcycling plastics into soap. One of the exciting features of Liu's new upcycling method is that it can be used on both polyethylene and polypropylene，meaning that it's not necessary to separate the two plastics from each other.This is a major advantage over some recycling methods used today.The upcycling technique also requires only plastic and heat，making it cost-effective with minimal environmental impact. Liu advised being careful，though.This method is just one part of a larger solution to the global plastic pollution crisis and a joint effort is needed between the research and industrial communities.“The best way to avoid plastic pollution is to minimise the use of plastics，” said Liu. 语篇解读　本文是一篇说明文。文章主要介绍了弗吉尼亚理工大学的研究人员开发的一种将塑料升级转化为高价值化学品，用以制造肥皂、清洁剂等的新方法。 4．What is the main purpose of Paragraph 2? A．To stress the challenge. B．To explain the process. C．To present the significance. D．To introduce the assumption. 推理判断题。根据第二段内容可知，本段主要介绍了Guoliang Liu教授的一个假设，即聚乙烯可以转化为脂肪酸，最终转化为肥皂。故本段的主要目的是介绍这个假设。故选D项。 √ 5．How does the upcycling process work? A．By heating plastics intensively. B．By mixing a chemical with plastics. C．By breaking down plastics in a reactor. D．By collecting the leftover to make waxes. 细节理解题。根据第三段中“Liu，along with two PhD chemistry students... to prevent further breakdown.”可知，升级转化过程是通过在反应器中分解塑料来进行的。故选C项。 √ 6．What makes this upcycling method stand out? A．Simple processing. B．Zero-waste practice. C．Potential market value. D．Low-energy consumption. 推理判断题。根据第四段中“The upcycling technique also requires only plastic and heat，making it cost-effective with minimal environmental impact.”可推知，这种升级转化方法的突出之处在于其加工过程简单，只需塑料和热量。故选A项。 √ 7．What is the best title for this passage? A．Plastic Waste，Precious Products B．From Waste to Wash C．Fighting Pollution with Innovation D．Saying No to Plastics 标题归纳题。通读全文，尤其根据第一段内容可知，本文主要介绍了一种将塑料废物转化为洗涤用品(如肥皂)的新方法。故B项“From Waste to Wash”最适合作文章标题。故选B项。 √ Ⅱ.语法填空(每小题1.5分，共15分) (2025·广东省部分名校高二上) This year marks the 10th anniversary of the first public appearance of Crested Ibises(朱鹮) 1.__________ (produce) by the Shanghai Dance Theatre (SDT).The drama was inspired by China's achievement in saving and protecting the crested ibis，which is known 2.____ “bird of good fortune” in Asian culture. The crested ibis，with its iconic red crest and long black beak，is believed to have existed for 60 million years and 3._________ (gradual) found in China，on the Korean Peninsula，Japan and Russia until the 1960s.Bird conservationists list pesticides，fertilizers，hunting，environmental and ecological reasons for 4.__________ (bring) the birds to the edge of extinction. produced as gradually bringing The crested ibis was thought to be extinct in China until seven wild birds 5._____________ (spot) in Yangxian County in Northwest China's Shaanxi Province in 1981，a discovery 6.__________ caused captive breeding (圈养繁殖) and strengthened protection of the species.After more than 40 years of continuous conservation，7.___ is estimated that there are over 11，000 crested ibises alive in 2024. SDT introduced the drama in 2014，and integrated Chinese folk dance and Western ballet.Traditional Chinese dance 8.______________ (characteristic) are used in upper body movements，while ballet and Western dance elements feature in the footwork，which makes it a masterpiece receiving 9.____________ (recognize) both home and abroad. were spotted which/that it characteristics recognition “For what was lost in the past，let's appeal to value the future forever，” SDT put it as the slogan in the promotional materials of the dance drama，reminding the public 10._______ (learn) from the lesson of the crested ibis and protect both the environment and the ecosystem. 语篇解读　本文是一篇说明文。文章主要介绍了由上海舞蹈剧院制作的、将中国民间舞蹈和西方芭蕾结合在一起的剧目《朱鹮》，并介绍了朱鹮这种鸟类的相关信息，呼吁人们保护环境和生态系统。 to learn 1．答案：produced 2．答案：as 考查介词。此处为固定短语be known as“被认为是，被称为”，所以此处应用介词as。故填as。 考查非谓语动词。该句谓语动词为marks，此处为非谓语动词作后置定语修饰Crested Ibises，Crested Ibises和produce之间为被动关系，所以为应用动词-ed形式。故填produced。 3．答案：gradually 4．答案：bringing 考查非谓语动词。由空前for可知，此处为动词-ing形式作宾语。故填bringing。 考查副词。此处为副词gradually作状语修饰动词found。故填gradually。 5．答案：were spotted 6．答案：which/that 考查定语从句。分析句子可知，设空处引导定语从句，先行词为a discovery，关系词在从句中作主语，所以应用关系代词which或that引导。故填which/that。 考查动词的时态、语态和主谓一致。此处为谓语动词，根据时间状语in 1981可知，此处为一般过去时，主语seven wild birds为复数名词，和spot之间为被动关系，所以应用一般过去时的被动语态。故填were spotted。 7．答案：it 8．答案：characteristics 考查名词复数。characteristic“特点”为可数名词，结合谓语动词为are used可知，此处应用名词复数形式。故填characteristics。 考查代词。分析句子可知，此处为固定句型it is estimated that...“据估计……”，其中it为形式主语，that从句作真正的主语。故填it。 9．答案：recognition 10．答案：to learn 考查非谓语动词。此处为固定短语remind sb to do sth“提醒某人做某事”，所以此处为动词不定式形式。故填to learn。 考查名词。空处应用名词，作宾语，recognition表示“承认，认可”，为不可数名词。故填recognition。 返回 谢 谢 观 看 UNIT 3　ENVIRONMENTAL PROTECTION 返回 $