精品解析：人教版英语八年级上册Unit 7 When Tomorrow Comes 单元练习卷

Unit 7 When Tomorrow Comes.随堂拔高过关练 Part1 词汇语法过关 一、根据句意及提示完成句子。 1. I hope to be a singer and hold many big c________ in the future. 【答案】concerts##oncerts 【解析】 【详解】句意：我希望未来成为一名歌手，并举办许多大型演唱会。该处需一个名词，在句中作及物动词hold的宾语；根据前文“be a singer”和动词“hold”提示，歌手所举办的活动通常是“演唱会/音乐会”；且空前有“many”，要求必须使用可数名词的复数形式。结合首字母“c”，故填concerts。 2. Jenny will study medicine and work out more ways to c________ more people. 【答案】cure##ure 【解析】 【详解】句意：珍妮将学习医学，并想出更多的方法来治愈更多的人。该处需一个动词。由于其前是不定式符号to，且构成“ways to do sth.”（做某事的方法）的固定搭配，其后必须接动词原形；结合前文“study medicine”和后文的宾语“more people”可知，其语义与“治愈，治好”相关；结合首字母“c”，故填cure。 3. Smoking makes it possible for people to have ________ (癌症). 【答案】cancer 【解析】 【详解】句意：吸烟让人们有可能患上癌症。空格处在句中作及物动词have的宾语，需用名词形式。由于此处作及物动词的宾语，且表示疾病名称“癌症”，为不可数名词。根据所给汉语提示可知，此处应填入cancer。 4. Nowadays, people seldom use c________ because using phones is more convenient (方便的). 【答案】cash##ash 【解析】 【详解】句意：如今人们很少用现金，因为使用手机更方便。结合首字母提示和“using phones is more convenient”可推知，此处可表示现在手机移动支付普及，比使用现金更方便。不可数名词cash意为“现金”，符合语境。 5. Can you find out whose ________ (钱包) it is? There is only some money and a card. 【答案】wallet 【解析】 【详解】句意：你能找出这是谁的钱包吗？里面只有一些钱和一张卡片。wallet“钱包”，可数名词，空前有whose修饰，此处用单数形式。故填wallet。 6. Many universities now have classes in ________ (机器人学). 【答案】robotics 【解析】 【详解】句意：现在很多大学都开设了机器人学相关的课程。根据句意和括号内的汉语提示可知，此处考查robotics“机器人学”，不可数名词。故填robotics。 7. The scientists are ________ (宾客) at the school to talk about the future of AI. 【答案】guests 【解析】 【详解】句意：这些科学家是学校的来宾，前来探讨人工智能的未来。guest意为“宾客”，是可数名词，主语scientists是复数，因此需要用名词复数形式，所以填guests。 8. They say robots will ________ (发展) new skills to understand people’s feelings by 2070. 【答案】develop 【解析】 【详解】句意：他们说，到2070年机器人将发展出新的技能来理解人们的感受。will是情态助动词，后面必须跟动词原形；“发展”对应的动词是develop。 9. Dr. Robert, the ________ (首席的) scientist, thinks robots will work ________ (到处), even in our schools and parks. 【答案】 ①. chief ②. everywhere 【解析】 【详解】句意：首席科学家罗伯特博士认为机器人将到处工作，甚至会出现在我们的学校和公园中。“首席的”对应形容词chief，用来修饰后面的名词scientist；“到处”对应地点副词everywhere，在此处作状语修饰动词work。 10. In an ________ (紧急情况), technology can help people get quick help through apps. 【答案】emergency 【解析】 【详解】句意：在紧急情况下，科技能帮助人们通过应用程序获得快速的援助。根据汉语提示可知，emergency“紧急情况”，名词作宾语，故填emergency。 11. They can also help people in dangerous places during ________ (灾难) like a flood. 【答案】disasters 【解析】 【详解】句意：它们也能在洪水这类灾难中帮助身处危险地方的人们。disaster意为“灾难”，是可数名词，此处泛指各类灾难，应填复数形式disasters。 12. Jobs like fixing old radios may ________ (消失), but new jobs like teaching robots will come. 【答案】disappear 【解析】 【详解】句意：修理旧收音机这类工作或许会消失，但像教机器人这类新职业将会出现。disappear意为“消失”，是动词，情态动词may后接动词原形，因此填disappear。 13. A future airplane ________ (飞行员) must learn to work with smart computers, not just fly. 【答案】pilot 【解析】 【详解】句意：未来的飞机飞行员必须学会与智能电脑合作，而不仅仅是驾驶飞机。“飞行员”对应的英文单词是“pilot”；句首有不定冠词“A”修饰，说明此处用单数形式即可，符合语法及语境要求，故填pilot。 14. Another speaker also ________ (提及) the new technology in the book ________ (行业). 【答案】 ①. mentioned ②. industry 【解析】 【详解】句意：另一位发言人也提及了图书行业中的这项新技术。第一空：“提及”对应的英文动词是mention。根据句意“Another speaker also mentioned the new technology…”，根据常见叙事语境默认使用过去式，所以用 mention的过去式 mentioned。第二空：“行业”对应的英文名词是industry。book industry为固定搭配，意为“图书行业”，此处指整体概念，使用单数形式industry。 二、用括号内所给词的适当形式填空。 15. I’m expecting a friend. I’m afraid I ________ (order) later. 【答案】will order 【解析】 【详解】句意：我正在等一位朋友。恐怕我要稍后再点餐了。order“点餐”，动词，根据“later”可知，此处表示将来要发生的动作，应用一般将来时，其结构为“will + 动词原形”。故填will order。 16. It’s cloudy all day today, but the weather ________ (change) tomorrow. 【答案】will change 【解析】 【详解】句意：今天整天都是阴天，但明天的天气将会改变。根据句末的时间状语tomorrow可知，此处表示将要发生的动作，应用一般将来时，其谓语结构为“will + 动词原形”。change的一般将来时形式为will change。 17. There ____________ (be) a talk about science and technology in ten minutes. 【答案】will be 【解析】 【详解】句意：十分钟后将会有一场关于科技的讲座。句中的时间状语in ten minutes意思是“十分钟后”，表示将来的时间，是一般将来时的标志。there be句型的一般将来时结构为“There will be+主语+其他”。故填will be。 18. Do you know when he ________? When he ________, please tell me! (come) 【答案】 ①. will come ②. comes 【解析】 【详解】句意：你知道他什么时候会来吗？当他来了，请告诉我！第一空位于Do you know后接的宾语从句中，从句动作come还没有发生，因此用一般将来时，填will come；第二空位于when引导的时间状语从句中，主句是祈使句，从句要用一般现在时，主语he是第三人称单数，所以动词come变第三人称单数形式comes。 19. Robots and machines ________ (help) us more in the future. 【答案】will help 【解析】 【详解】句意：机器人和机器在未来会更多地帮助我们。“in the future”是一般将来时的标志，一般将来时的结构为“will + 动词原形”，help的原形是help。故填will help。 三、 从方框中选词并用其适当形式填空。 either, begin, pass, few, win 20. Work hard, Tom, and you ________ the final exam. 21. —Can you guess who the ________ of the game will be? —Bill. He is very clever. 22. I think we can arrive at the cinema before the film ________. 23. Peter doesn’t want to be a doctor and I don’t, ________. 24. —What will the future be like? —Maybe there will be ________ trees than before. 【答案】20. will pass 21. winner 22. begins 23. either 24. fewer 【解析】 【20题详解】 句意：努力学习，汤姆，你将会通过期末考试。此处需要一个动词，作句子的谓语，前文提到“Work hard”和“the final exam”，说明努力学习就会“通过”考试，描述将来的事情，方框中pass意为“通过”，需用一般将来时will pass。 【21题详解】 句意：——你能猜出谁将是这场比赛的获胜者吗？——Bill。他非常聪明。此处需要一个名词，作句子的表语，前文提到“who the...of the game will be”，说明询问比赛的“获胜者”，方框中win意为“获胜”，需用名词形式winner，意为“获胜者”。 【22题详解】 句意：我想我们可以在电影开始前到达电影院。此处需要一个动词，作before引导的时间状语从句的谓语，前文提到“arrive at the cinema before the film”，说明在电影“开始”前到达，方框中begin意为“开始”，主语the film为第三人称单数，时态为一般现在时，需用第三人称单数形式begins。 【23题详解】 句意：Peter不想成为一名医生，我也不想。此处需要一个副词，用于否定句末尾，前文提到“Peter doesn’t want to be a doctor and I don’t”，说明Peter不想当医生，“我”也“不想”，方框中either意为“也”，用于否定句末尾，符合语境。 【24题详解】 句意：——未来会是什么样子？——也许树会比以前更少。此处需要一个形容词的比较级，修饰名词trees前文提到“What will the future be like”，后文说“than before”，说明未来树“更少”，方框中few意为“少的”，需用比较级fewer修饰可数名词trees，意为“更少的”。 四、按要求完成句子，每空一词。 25. People will live to be 300 years old. (改为一般疑问句，并作否定回答) —________ ________ ________ to be 300 years old? —________, they ________. 【答案】 ①. Will ②. people ③. live ④. No ⑤. won’t 【解析】 【详解】句意：人们将会活到300岁。变一般疑问句：原句是一般将来时，含有情态动词will。变一般疑问句时，将will提至句首（首字母大写），后接主语people和动词原形 live。作否定回答：一般疑问句的否定回答结构为“No, 主语 + won’t”。原句主语 People是复数，在答语中用代词they代替（题干已给出）；will not 缩写为won’t。故填Will；people；live；No；won’t。 26. Alice will go to visit her grandparents with her father next month. (对画线部分提问) ________ ________ Alice ________ with her father next month? 【答案】 ①. What ②. will ③. do 【解析】 【详解】句意：爱丽丝下个月将会和爸爸一起去看望她的祖父母。画线部分“go to visit her grandparents”是具体的动作行为，对“做什么”提问，应使用特殊疑问词What。原句是一般将来时（will+动词原形），变为特殊疑问句时，助动词will需提到主语Alice之前，用动词do来代替画线部分。结构为：What + will + 主语 + do + 其他？ 27. Would you like to go to the zoo with me? (改为同义句) ________ ________ go to the zoo together? 【答案】 ①. Shall ②. we 【解析】 【详解】句意：你愿意和我一起去动物园吗？原句中“和我一起”是关键词，表达提议的同义句型为Shall we do sth.；Shall置于句首首字母大写，后接主语we，空后跟动词原形go，故填Shall; we。 28. I will send him the e-mail the day after tomorrow. (改为否定句) I ________ ________ him the e-mail the day after tomorrow. 【答案】 ①. won’t ②. send 【解析】 【详解】句意：我后天不会给他发这封电子邮件。原句为一般将来时，含有情态助动词will，改为否定句直接在will后加not，缩写为won’t，后面的实义动词使用原形send，故填won’t；send。 29. They’re going to see a film after work. (改为同义句) They ________ ________ a film after work. 【答案】 ①. will ②. see 【解析】 【详解】句意：他们下班后打算去看电影。原句“be going to + 动词原形”是一般将来时的结构，其同义表达可替换为“will + 动词原形”，所以此处填“will see”，即“They will see a film after work.”。故填①will；②see。 Part 2 单元阅读综合练习 五、 阅读还原，有一项多余。 What picture of the future do you have? Will life in the future be better, worse or the same as now? What’s your hope for the future? ____30____ Can you imagine people will work and live in the sea? ____31____ By submarine (潜水艇)! Some scientists believe that some day the number of submarines will be as large as the number of today’s cars. A famous French driver says, “One day, men will walk on the ocean floor as they do in the street!” ____32____ Some of these problems, similar to those of living on the moon, are lack (缺少) of oxygen (氧气) and weightlessness (失重). ____33____ For example, what will happen to our bodies if we live in water for a very long time? Scientists are looking for answers. Maybe men will be able to live in the sea in 60 years, away from the crowded and noisy cities on land. ____34____ And life in the sea is more comfortable. Don’t you think so? A. There will be more rubbish on the moon in the future. B. But how will people go to work then? C. Men will find it fun and interesting to live in the sea. D. Where do you think people will live in the future? E. Many questions are still hard to answer. F. If humans want to live in the sea, they have to solve a lot of problems first. 【答案】30. D 31. B 32. F 33. E 34. C 【解析】 【导语】本文讲述了未来人类可能生活在海洋中的设想，包括如何到达海洋、在海洋生活中需要解决的问题，以及海洋生活相较于陆地的优势。 【30题详解】 第一段提到“What picture of the future do you have? … What’s your hope for the future?”连续提出关于未来的问题，空格后直接转入“Can you imagine people will work and live in the sea?”，因此空格处应引出“你认为未来人们会住在哪里”这一话题。D项“Where do you think people will live in the future?”符合上下文逻辑。 【31题详解】 第二段提到“Can you imagine people will work and live in the sea? … By submarine (潜水艇)!”，空格后直接回答“By submarine!”，说明问的是“如何去那里”。B项“But how will people go to work then?”符合上下文逻辑。 【32题详解】 第三段提到“Some of these problems, similar to those of living on the moon, are lack of oxygen and weightlessness.”，空格后列举了具体问题（缺氧和失重），因此空格处应引出“如果想在海里生活，必须先解决很多问题”。F项“If humans want to live in the sea, they have to solve a lot of problems first.”符合上下文逻辑。 【33题详解】 第三段提到“For example, what will happen to our bodies if we live in water for a very long time? Scientists are looking for answers.”，空格后给出具体问题示例，因此空格处应引出“许多问题仍然难以回答”。E项“Many questions are still hard to answer.”符合上下文逻辑。 【34题详解】 第四段提到“Maybe men will be able to live in the sea in 60 years, … And life in the sea is more comfortable.”，空格后提到“海洋生活更舒适”，因此空格处应引出“人们会发现生活在海洋中有趣且令人愉快”。C项“Men will find it fun and interesting to live in the sea.”符合上下文逻辑。 六、词语运用。 A Life is colorful. What will life be like in 2050? Will life be better, worse or the same _____35_____ now? I often think about the future. I believe life will probably be very different in 2050. First, I think there will _____36_____ no televisions in 2050. People will watch all kinds of programs on the Internet, so they won’t need TVs. I believe _____37_____ will be as cheap as telephones. Most people will spend less money buying their personal computers. For transportation, cars will run on clean fuels (燃料), _____38_____ there will be less pollution. By 2050, cars will have computers to control how quickly they run. Now for you in 2050, robots will work _____39_____, such as in schools, offices and homes. 【答案】35. as 36. be 37. computers 38. so 39. everywhere 【解析】 【导语】本文是一篇说明文。作者围绕2050年的生活展开想象，从电视与电脑、交通出行、机器人应用三个方面，描述了科技将如何改变人们的生活方式，表达了对未来美好生活的期待。 【35题详解】 句意：生活会变得更好、更糟，还是和现在一样？the same as意为“和……一样”，是固定搭配，符合此处将未来和现在生活对比的语境。 【36题详解】 句意：首先，我认为2050年将不会有电视机。此处是there be句型，时间状语in 2050表示将来的时间，应用there be句型的一般将来时，结构为there will be，因此填be。 【37题详解】 句意：我相信电脑会像电话一样便宜。根据后文提到的“personal computers”可知，此处指电脑会和电话一样便宜，表泛指用复数名词computers。 【38题详解】 句意：关于交通，汽车将使用清洁燃料，所以污染会更少。“cars will run on clean fuels”和“there will be less pollution”之间是因果关系，前半句是原因，后半句是结果，应用表示结果的连词so连接。 【39题详解】 句意：到了2050年，机器人将在各地工作，比如在学校、办公室和家庭中。后文举例了学校、办公室、家等多个地点，此处表示机器人会在各处工作，因此填everywhere“到处”。 B but, win, they, quick, help, easy, plan, happy, through, one, teach, promise Think about your school mornings. Students pass their schoolwork through different hands, from their group leader (组长) to the subject representative  (课代表) , and finally to the ____40____. It sounds easy, ____41____ sometimes it can go wrong and take a lot of time. Tom, a middle school boy, did a meaningful job ____42____ with this problem. He made a smart homework collection (收集) robot and ____43____ the first prize in the Children’s Invention (发明) Awards. Each student’s notebook has a special tag (标签) with their name and the subject. Students only need to put ____44____ notebooks on the robot, and the robot “sees” the notebook, reads its tag and takes it out of the name list. “Teachers can check who doesn’t hand in homework by connecting their phones with the robot ____45____ Wi-Fi,” Tom told reporters. These days, he ____46____ to develop a new one to improve. He hopes to use higher technology to read lots of tags from far away. That means if your notebook has a special tag, the robot can read the information from all the notebooks ____47____. Tom believes life will become ____48____ than before by using AI. Tom will be a scientist when he grows up, “I am trying making model planes and other scientific and creative things. Making something new brings me joy and ____49____,” he said. 【答案】40. teacher 41. but 42. to help 43. won 44. their 45. through 46. plans 47. quickly 48. easier 49. happiness 【解析】 【导语】本文讲述中学生汤姆发现收作业流程繁琐易出错，于是发明智能收作业机器人并获奖，如今他计划升级机器人，畅想人工智能会让生活更便捷，同时表达了创造新事物带给他快乐与幸福感。 【40题详解】 句意：学生的作业经过多人传递，从组长到课代表，最后交给老师。“and finally to the ______”表示作业层层上交，最终交付的对象，此处需要一个指人的名词，teach对应的名词teacher意为老师，符合收作业的流程语境，所以选择teacher。 【41题详解】 句意：这听起来简单，但有时流程会出问题，还会耗费大量时间。“It sounds easy, ______ sometimes”表示前后两句语义相反，存在转折逻辑，此处需要一个转折连词，but含义为但是，可衔接对立语义，所以选择but。 【42题详解】 句意：中学生汤姆做了一件有意义的事来帮忙解决这个难题。“a meaningful job ______ with this problem”表示做事的目的是处理难题，固定搭配help with sth.，此处需要动词不定式作后置定语表目的，变形为to help，所以选择to help。 【43题详解】 句意：他制作了一台智能收作业机器人，并在少年发明大赛中斩获一等奖。“and ______ the first prize”表示and连接并列谓语，时态需与made保持一般过去时，搭配win the first prize，此处需要动词过去式，win变形为won，所以选择won。 【44题详解】 句意：学生只需要把他们的笔记本放到机器人上，机器人就能识别标签并对应名单登记。“put ______ notebooks”表示笔记本归属于学生们，此处需要形容词性物主代词修饰名词notebooks，they变形为their，意为他们的，所以选择their。 【45题详解】 句意：汤姆告诉记者：“老师们把手机通过无线网络和机器人相连，就能查看谁没交作业。“robot ______ Wi-Fi”表示借助无线网络完成设备连接，此处需要介词，through有“通过、借助媒介”的含义，所以选择through。 【46题详解】 句意：最近这些天，他计划研发新款机器人来优化功能。“he ______ to develop a new one”表示现阶段他有研发新机器人的打算，固定搭配plan to do sth.，主语he为第三人称单数，此处需要一般现在时动词三单形式，plan变形为plans，所以选择plans。 【47题详解】 句意：这意味着只要笔记本带有专属标签，机器人就能快速读取所有本子上的信息。“notebooks ______”表示修饰动词read，说明读取信息的状态，此处需要副词，quick变形为quickly，意为快速地，所以选择quickly。 【48题详解】 句意：汤姆相信运用人工智能，生活会变得比从前更轻松。“become ______ than before”表示than提示形容词要用比较级，此处需要形容词比较级作表语，easy变形为easier，意为更轻松的，所以选择easier。 【49题详解】 句意：他说：“制作全新的事物带给我喜悦与幸福感。“joy and ______”表示and并列两个名词作宾语，此处需要名词，happy变形为happiness，意为幸福，所以选择happiness。 第1页/共1页 学科网（北京）股份有限公司 $ Unit 7 When Tomorrow Comes.随堂拔高过关练 Part1 词汇语法过关 一、根据句意及提示完成句子。 1. I hope to be a singer and hold many big c________ in the future. 2. Jenny will study medicine and work out more ways to c________ more people. 3. Smoking makes it possible for people to have ________ (癌症). 4. Nowadays, people seldom use c________ because using phones is more convenient (方便的). 5. Can you find out whose ________ (钱包) it is? There is only some money and a card. 6. Many universities now have classes in ________ (机器人学). 7. The scientists are ________ (宾客) at the school to talk about the future of AI. 8. They say robots will ________ (发展) new skills to understand people’s feelings by 2070. 9. Dr. Robert, the ________ (首席的) scientist, thinks robots will work ________ (到处), even in our schools and parks. 10. In an ________ (紧急情况), technology can help people get quick help through apps. 11. They can also help people in dangerous places during ________ (灾难) like a flood. 12. Jobs like fixing old radios may ________ (消失), but new jobs like teaching robots will come. 13. A future airplane ________ (飞行员) must learn to work with smart computers, not just fly. 14. Another speaker also ________ (提及) the new technology in the book ________ (行业). 二、用括号内所给词的适当形式填空。 15. I’m expecting a friend. I’m afraid I ________ (order) later. 16. It’s cloudy all day today, but the weather ________ (change) tomorrow. 17. There ____________ (be) a talk about science and technology in ten minutes. 18. Do you know when he ________? When he ________, please tell me! (come) 19. Robots and machines ________ (help) us more in the future. 三、 从方框中选词并用其适当形式填空。 either, begin, pass, few, win 20. Work hard, Tom, and you ________ the final exam. 21. —Can you guess who the ________ of the game will be? —Bill. He is very clever. 22. I think we can arrive at the cinema before the film ________. 23. Peter doesn’t want to be a doctor and I don’t, ________. 24. —What will the future be like? —Maybe there will be ________ trees than before. 四、按要求完成句子，每空一词。 25. People will live to be 300 years old. (改为一般疑问句，并作否定回答) —________ ________ ________ to be 300 years old? —________, they ________. 26. Alice will go to visit her grandparents with her father next month. (对画线部分提问) ________ ________ Alice ________ with her father next month? 27. Would you like to go to the zoo with me? (改为同义句) ________ ________ go to the zoo together? 28. I will send him the e-mail the day after tomorrow. (改为否定句) I ________ ________ him the e-mail the day after tomorrow. 29. They’re going to see a film after work. (改为同义句) They ________ ________ a film after work. Part 2 单元阅读综合练习 五、 阅读还原，有一项多余。 What picture of the future do you have? Will life in the future be better, worse or the same as now? What’s your hope for the future? ____30____ Can you imagine people will work and live in the sea? ____31____ By submarine (潜水艇)! Some scientists believe that some day the number of submarines will be as large as the number of today’s cars. A famous French driver says, “One day, men will walk on the ocean floor as they do in the street!” ____32____ Some of these problems, similar to those of living on the moon, are lack (缺少) of oxygen (氧气) and weightlessness (失重). ____33____ For example, what will happen to our bodies if we live in water for a very long time? Scientists are looking for answers. Maybe men will be able to live in the sea in 60 years, away from the crowded and noisy cities on land. ____34____ And life in the sea is more comfortable. Don’t you think so? A. There will be more rubbish on the moon in the future. B. But how will people go to work then? C. Men will find it fun and interesting to live in the sea. D. Where do you think people will live in the future? E. Many questions are still hard to answer. F. If humans want to live in the sea, they have to solve a lot of problems first. 六、词语运用。 A Life is colorful. What will life be like in 2050? Will life be better, worse or the same _____35_____ now? I often think about the future. I believe life will probably be very different in 2050. First, I think there will _____36_____ no televisions in 2050. People will watch all kinds of programs on the Internet, so they won’t need TVs. I believe _____37_____ will be as cheap as telephones. Most people will spend less money buying their personal computers. For transportation, cars will run on clean fuels (燃料), _____38_____ there will be less pollution. By 2050, cars will have computers to control how quickly they run. Now for you in 2050, robots will work _____39_____, such as in schools, offices and homes. B but, win, they, quick, help, easy, plan, happy, through, one, teach, promise Think about your school mornings. Students pass their schoolwork through different hands, from their group leader (组长) to the subject representative  (课代表) , and finally to the ____40____. It sounds easy, ____41____ sometimes it can go wrong and take a lot of time. Tom, a middle school boy, did a meaningful job ____42____ with this problem. He made a smart homework collection (收集) robot and ____43____ the first prize in the Children’s Invention (发明) Awards. Each student’s notebook has a special tag (标签) with their name and the subject. Students only need to put ____44____ notebooks on the robot, and the robot “sees” the notebook, reads its tag and takes it out of the name list. “Teachers can check who doesn’t hand in homework by connecting their phones with the robot ____45____ Wi-Fi,” Tom told reporters. These days, he ____46____ to develop a new one to improve. He hopes to use higher technology to read lots of tags from far away. That means if your notebook has a special tag, the robot can read the information from all the notebooks ____47____. Tom believes life will become ____48____ than before by using AI. Tom will be a scientist when he grows up, “I am trying making model planes and other scientific and creative things. Making something new brings me joy and ____49____,” he said. 第1页/共1页 学科网（北京）股份有限公司 $