Unit 4 Section B 1a-1f & Vocabulary in Use（知识清单）英语新教材人教版八年级上册

该初中英语知识清单围绕“神奇动植物与生态关联”主题，系统梳理Unit 4 Section B核心词汇与句型考点。必背词汇涵盖动词、名词、形容词等27个基础及拓展词汇，必会考点从词汇用法（如connect, without）到句型结构（如imagine doing, in order to），再到主题应用（如生态保护），构建从基础积累到综合运用的学习支架。 知识链路以“关联-依存-保护”逻辑展开，每个考点配套例句、拓展辨析及即时练习，强化语言能力培养。通过动植物生态主题渗透人类命运共同体意识，辨析题（如play a part in与take part in）提升思维品质，即时练习助力学习能力发展，形成“学-练-用”一体化的学科特色学习方法。

Unit 4 Amazing Plants and Animals Section B ( 1a-1f & Vocabulary in Use) 核心知识梳理 一、必背词汇 ( 1 / 11 )学科网（北京）股份有限公司 学科网（北京）股份有限公司 1.关联；连接（动词）：connect 2.连接的；相关的（形容词）：connected 3.行星（名词）：planet 4. 没有；缺乏（介词）：without 5. 贮存；存储（动词）&百货商店；商店（名词）：store 6.想象；猜想（动词）： imagine 7. 蜂巢（名词）：honeycomb 8.蜂蜜；（爱称）：亲爱的（名词）： honey 9. 交流；沟通（动词）：communicate 10.失望的；沮丧的（形容词）： disappointed 11. 生态系统（名词）：ecosystem 12. 联系；连接（名词）：connection 13. 保护；防护（动词）：protect 14. 授粉（名词）：pollination 15. 重要性（名词）：importance 16. 花粉单词（名词）：pollen 17.标题；题目；名称（名词）： title 18. 行动；行为（名词）：action 19. 人（名词）：人的&人类的（形容词）：human 20. 蚂蚁（名词）：ant 21. 幸福快乐（名词）：happiness 22. 使失望；使破灭（动词）：disappoint 23. 蘑菇；伞菌（名词）：mushroom 24. 吨（名词）：ton 1.关联；连接（动词）： 2.连接的；相关的（形容词）： 3.行星（名词）： 4. 没有；缺乏（介词）： 5. 贮存；存储（动词）&百货商店；商店（名词）： 6.想象；猜想（动词）： 7. 蜂巢（名词）： 8.蜂蜜；（爱称）：亲爱的（名词）： 9. 交流；沟通（动词）： 10.失望的；沮丧的（形容词）： 11. 生态系统（名词）： 12. 联系；连接（名词）： 13. 保护；防护（动词）： 14. 授粉（名词）： 15. 重要性（名词）： 16. 花粉单词（名词）： 17.标题；题目；名称（名词）： 18. 行动；行为（名词）： 19. 人（名词）；人的&人类的（形容词）： 20. 蚂蚁（名词）： 21. 幸福快乐（名词）： 22. 使失望；使破灭（动词）： 23. 蘑菇；伞菌（名词）： 24. 吨（名词）： ( 2 / 11 )学科网（北京）股份有限公司 学科网（北京）股份有限公司 25.作用；职能；角色（名词）： role 26.豌豆（名词）： pea 27. 气候（名词）：climate 25.作用；职能；角色（名词）： 26. 豌豆（名词）： 27. 气候（名词）： 二、必会考点 1. ①How are plant sand animals connected with us?植物和动物是如何与我们联系在一起的? ②At this moment you realize people,plants, and animals are all connected.此时此刻，你会意识到人类、植物和动物都是相互关联的。 ③We need each other to live,and bees are one of the best examples of this connection.我们彼此依存才能生存.而蜜蜂就是这种关联的最佳例证之一。 【知识点】（1）connect动词，关联；连接 ①作及物动词时，connect...with/to...把.和.....连接或联系起来 例句：The teacher connected the new information with what we learned last week.老师把新信息和我们上周学到的内容联系了起来。 例句：The new highway will connect the town to the city.新高速公路将把小镇和城市连接起来。 ②作不及物动词时，connect to /with 与.....连接，与.....联系 例句：This corridor connects with the living room . 这条走廊与客厅相连。 Community connects us with each other .社区把我们与他人联系起来。 【拓展】connection 名词，联系；连接 例句：They found a connection between the two stories.他们发现了这两个故事之间的联系。 （2）connected形容词，连接的;相关的 be connected with to 与.....相连;与.....有关联 例句：The two computers are connected to the same network.这两台电脑连接到了同一个网络。 The new movie is connected with the book I read last year.这部新电影和我去年读的那本书有关。 【即时练习】 1．I heard that a new bike lane will be built to ________ our neighborhood directly to school. It will be much safer for us. A．compare B．contact C．lead D．connect 2．—There is a strong ________ between hard work and success. —I think so. No pain, no gain. A．story B．connection C．promise D．hobby 2、We Can't Live Without Bees 没有蜜蜂，我们无法生存。 【知识点】without 介词，没有;缺乏。后接名词、代词或动词-ing 形式作宾语，常用来表示伴随或假设的情况。其反义词为 with。 例句：Can you finish your homework without him?没有他你能完成你的作业吗? They left without saying goodbye.他们没说再见就走了。 She enjoys reading books with her friends. 她喜欢和朋友们一起读书。 【即时练习】 1．Fifteen per cent of the subjects ________ too hard for me, so I can’t finish them ________ any help. A．seems; without B．are; with C．is; without D．seem; without 3、Imagine you go to the supermarket in your area,but there are almost no fruits vegetables, honey, milk,eggs, or chocolate想象一下，你去附近的超市，但那里几乎没有水果、蔬菜、蜂蜜、牛奶、鸡蛋或巧克力。 【知识点】imagine动词，想象;猜想后接名词、代词、动词-ing 形式或宾语从句作宾语，但不可接动词不定式。 例句：Can you imagine life on a lonely island?你能想象在荒岛上的生活吗? Just imagine being a teacher.想象一下自己是一名教师。 Close your eyes and imagine that you are in a forest.闭上眼睛，想象自己在森林里。 【常见搭配】imagine（sb.）doing sth.想象（某人）做某事。 Imagine +从句 想象..... 例句：She couldn’t imagine living in a place like that .她无法想象住在那样一个地方。 Can you imagine that we could build a beautiful city with rubbish ? 你能想象我们可以用垃圾建一座漂亮的城市吗？ 【拓展】Imagination名词，想象力;想象 例句：With a little imagination, you could tun this place into a palace.稍微动点脑筋，你就能把这个地方变得富丽堂皇。 【即时练习】 1．—Trees are really important to us. —Yes, I can’t ________ living in a world without trees. A．solve B．connect C．describe D．imagine 2．—Can you ________ your life in the future? —Of course. I think I’ll have two children. A．believe B．imagine C．build D．understand 4、In fact without their work about 80 per cent of the plants in the world cannot grow.事实上，如果没有它们的劳作，世界上大约80%的植物都无法生长。 【知识点】 per cent名词，百分之数词加 percent 构成百分数，其中 per cent 无复数形式，与名词连用时，后面需要加of。 例句：Twenty per cent of the students are absent today.今天有 20%的学生缺席。 【拓展】“数词+per cent of十名词”作主语时，谓语动词的数要与of后面的名词的单复数保持一致。 例句：Sixty per cent of the boys in our class like music.我们班 60%的男生喜欢音乐。 Fifteen per cent of the water is polluted.15%的水被污染了。 【即时练习】 1．About 70 percent of the students in our school ________ from the countryside, and they ________ hardworking. A．is; is B．are; are C．is; are D．are; is 5、In order to store honey, they create honeycombs.为了储存蜂蜜，它们构筑蜂巢。 【知识点】in order to 为了;以便后跟动词原形，表示目的，可放在句首或句中。其否定形式为 in order not to 例句：In order to finish the writing, he worked late into the night.为了完成那篇文章，他工作到深夜。 例句：He left quickly in order not to wake the baby.他悄悄地离开，以免吵醒婴儿。 【拓展】in order to 可转换为 in order that 或 so that 引导的目的状语从句。 例句He studied hard in order to pass the exam.=He studied hard in order that/so that he could pass the exam.为了通过考试，他努力学习。 【即时练习】 1．—Why do you practice playing the piano for an hour every day? —________ improve my skills for the coming music competition. A．In order to B．As long as C．In order that 6、Another interesting thing about bees is how they communicate.关于蜜蜂的另一件有趣的事是它们的交流方式。 【知识点】communicate动词，交流;沟通 communicate with sb与某人联系;与某人交流 例句：They seldom communicate openly about their feelings.他们很少开诚布公地交流他们的感受。 I communicate with my friends on social media.我通过社交媒体与我的朋友们交流。 【拓展】communication 名词，交流;交际 例句：Good communication is the key to a successful team.良好的交流是团队成功的关键。 【即时练习】 1．—It’s important to ________ with your parents when you have problems. —You’re right. They can always give you good advice. A．create B．collect C．communicate 2．—How do you usually ________ with your friends? —We often chat on WeChat and sometimes meet up. A．communicate B．compare C．compete D．complete 7、Bees play an important part in the ecosystem of our planet. 蜜蜂在我们地球的生态系统中扮演着重要角色。 【知识点】play a part(in sth) 参与某事，其后可接名词、代词或动词-ing 形式。part 前可用形容词修饰。 例句：Every student can play a part in making the school better.每个学生都能在让学校变得更好中发挥作用。 例句：You can play a part in protecting the environment你可以在保护环境中发挥作用。 【辨析】 play a part in 与 take part in play a part in强调在某个事件中所起的作用或影响 take part in强调参与的行为 例句：Each member of the team played a part in achieving our goal 团队中的每个成员都在实现我们的目标中起了作用。(强调每个成员对实现目标的贡献) Many students took part in the science fair last year.去年许多学生参加了科学展览。(强调学生参与活动的行为) 8、Think about what you can do to protect one of the most amazing animals on earth想想你能做些什么来保护地球上最神奇的动物之一吧。 【知识点】protect动词，保护；防护 protect...from/against...保护......免受 例句：You should learn to protect yourself.你应该学会保护自己。 You should protect your books from getting wet.你应该保护你的书不被弄湿. Protect your plants against pests.保护你的植物不受害虫的侵害。 【拓展】protection名词，保护；防卫 例句：Wearing a helmet is a form of protection for your head.戴头盔是保护头部的一种方式。 【即时练习】 1．It’s important to ________ animals because they are our good friends. A．describe B．attend C．cover D．protect 2．—Lots of people did amazing things to ________ our country during the war. —You are right. They are the great people in our hearts. A．describe B．protect C．decorate 9、importance 重要性 【知识点】importance名词，重要性 the importance of doing sth 做某事的重要性 例句：Anyone can see the importance of good health.人人都知道健康的重要性。 We all know the importance of learning a foreign language well.我们都知道学好一门外语的重要性。 Understanding the importance of doing your homework helps you study better. 理解做作业的重要性有助于你更好地学习。 【拓展】 important 形容词，重要的 例句：I have something important to tell you.我有重要的事告诉你。 【即时练习】 1．—Do you learn how to protect yourself from danger at school? —Of course. We always have lessons about the ________ of safety. A．practice B．chance C．difference D．importance 2．After watching the Victory Day celebration on September 3rd, we are more aware of the ________ of peace. A．difference B．importance C．patience D．sentence 10、disappoint 使失望 【知识点】disappoint 动词，使失望；使破灭。后接名词或代词作宾语。 例句：The weather disappointed our hopes for a picnic.天气使我们的野餐希望破灭。 He disappointed himself by not trying his best. 他因为没有尽力而让自己失望。 【常见搭配】 be disappointed with /in sb./sth .对某人/某事失望。 be disappointed at /by sth .对某事失望。 be disappointed to do sth .对做某事感到失望。 【拓展】 disappointment 名词 失望 Missing the bus was a big disappointment.错过公交车是一件让人非常失望的事。 disappointed 形容词 “失望的”，多用来修饰人 She was disappointed with the gift. 她对这个礼物感到失望。 disappointing 形容词 “令人失望的”，多用来修饰物 The terrible weather was disappointing.这糟糕的天气令人扫兴。 【即时练习】 1．—Did you see Yaming just now? He sat quietly in the classroom alone. —Yeah. He worked hard for the school science competition for weeks and hoped to win first prize. But he lost it, so he looked ________. A．disappointed B．surprised C．unhappy D．worried 2．My parents were ________ that I didn’t do well in the exam. I promised them I would study harder next time. A．disappointed B．proud C．lively D．elderly 11、You may not realize it but frogs play an important role in our planet's ecosystem.你可能没有意识到，但青蛙在我们星球的生态系统中扮演着重要角色。 【知识点】 play a role(in)在....中发挥作用:扮演角色 in为介词,后接名词、代词或动词-ing形式。其中role为名词,意为“作用;职能;角色”,其前可用important、active、key 等词对其含义加以补充说明。 同义表达:play a part in 例句：You played a role in making the party a success.你在使聚会成功中起了作用。 She played an important role in the school play.她在学校戏剧中扮演一个重要的角色。 【辨析】play a part in与 play a role(in) play a part in （在.....中）发挥作用。有参与某事的含义。 play a role(in)（在.....中）扮演角色。 【即时练习】 1．Bees play an important ________ in the ecosystem of our planet. A．game B．role C．part D．B and C 2．In modern society, computers play an important ________ in our lives. A．service B．role C．seat D．rule $Unit 4 Amazing Plants and Animals Section B ( 1a-1f & Vocabulary in Use) 核心知识梳理 一、必背词汇 ( 1 / 11 )学科网（北京）股份有限公司 学科网（北京）股份有限公司 1.关联；连接（动词）：connect 2.连接的；相关的（形容词）：connected 3.行星（名词）：planet 4. 没有；缺乏（介词）：without 5. 贮存；存储（动词）&百货商店；商店（名词）：store 6.想象；猜想（动词）： imagine 7. 蜂巢（名词）：honeycomb 8.蜂蜜；（爱称）：亲爱的（名词）： honey 9. 交流；沟通（动词）：communicate 10.失望的；沮丧的（形容词）： disappointed 11. 生态系统（名词）：ecosystem 12. 联系；连接（名词）：connection 13. 保护；防护（动词）：protect 14. 授粉（名词）：pollination 15. 重要性（名词）：importance 16. 花粉单词（名词）：pollen 17.标题；题目；名称（名词）： title 18. 行动；行为（名词）：action 19. 人（名词）：人的&人类的（形容词）：human 20. 蚂蚁（名词）：ant 21. 幸福快乐（名词）：happiness 22. 使失望；使破灭（动词）：disappoint 23. 蘑菇；伞菌（名词）：mushroom 24. 吨（名词）：ton 1.关联；连接（动词）： 2.连接的；相关的（形容词）： 3.行星（名词）： 4. 没有；缺乏（介词）： 5. 贮存；存储（动词）&百货商店；商店（名词）： 6.想象；猜想（动词）： 7. 蜂巢（名词）： 8.蜂蜜；（爱称）：亲爱的（名词）： 9. 交流；沟通（动词）： 10.失望的；沮丧的（形容词）： 11. 生态系统（名词）： 12. 联系；连接（名词）： 13. 保护；防护（动词）： 14. 授粉（名词）： 15. 重要性（名词）： 16. 花粉单词（名词）： 17.标题；题目；名称（名词）： 18. 行动；行为（名词）： 19. 人（名词）；人的&人类的（形容词）： 20. 蚂蚁（名词）： 21. 幸福快乐（名词）： 22. 使失望；使破灭（动词）： 23. 蘑菇；伞菌（名词）： 24. 吨（名词）： ( 2 / 11 )学科网（北京）股份有限公司 学科网（北京）股份有限公司 25.作用；职能；角色（名词）： role 26.豌豆（名词）： pea 27. 气候（名词）：climate 25.作用；职能；角色（名词）： 26. 豌豆（名词）： 27. 气候（名词）： 二、必会考点 1. ①How are plant sand animals connected with us?植物和动物是如何与我们联系在一起的? ②At this moment you realize people,plants, and animals are all connected.此时此刻，你会意识到人类、植物和动物都是相互关联的。 ③We need each other to live,and bees are one of the best examples of this connection.我们彼此依存才能生存.而蜜蜂就是这种关联的最佳例证之一。 【知识点】（1）connect动词，关联；连接 ①作及物动词时，connect...with/to...把.和.....连接或联系起来 例句：The teacher connected the new information with what we learned last week.老师把新信息和我们上周学到的内容联系了起来。 例句：The new highway will connect the town to the city.新高速公路将把小镇和城市连接起来。 ②作不及物动词时，connect to /with 与.....连接，与.....联系 例句：This corridor connects with the living room . 这条走廊与客厅相连。 Community connects us with each other .社区把我们与他人联系起来。 【拓展】connection 名词，联系；连接 例句：They found a connection between the two stories.他们发现了这两个故事之间的联系。 （2）connected形容词，连接的;相关的 be connected with to 与.....相连;与.....有关联 例句：The two computers are connected to the same network.这两台电脑连接到了同一个网络。 The new movie is connected with the book I read last year.这部新电影和我去年读的那本书有关。 【即时练习】 1．I heard that a new bike lane will be built to ________ our neighborhood directly to school. It will be much safer for us. A．compare B．contact C．lead D．connect 【答案】D 2．—There is a strong ________ between hard work and success. —I think so. No pain, no gain. A．story B．connection C．promise D．hobby 【答案】B 2、We Can't Live Without Bees 没有蜜蜂，我们无法生存。 【知识点】without 介词，没有;缺乏。后接名词、代词或动词-ing 形式作宾语，常用来表示伴随或假设的情况。其反义词为 with。 例句：Can you finish your homework without him?没有他你能完成你的作业吗? They left without saying goodbye.他们没说再见就走了。 She enjoys reading books with her friends. 她喜欢和朋友们一起读书。 【即时练习】 1．Fifteen per cent of the subjects ________ too hard for me, so I can’t finish them ________ any help. A．seems; without B．are; with C．is; without D．seem; without 【答案】D 3、Imagine you go to the supermarket in your area,but there are almost no fruits vegetables, honey, milk,eggs, or chocolate想象一下，你去附近的超市，但那里几乎没有水果、蔬菜、蜂蜜、牛奶、鸡蛋或巧克力。 【知识点】imagine动词，想象;猜想后接名词、代词、动词-ing 形式或宾语从句作宾语，但不可接动词不定式。 例句：Can you imagine life on a lonely island?你能想象在荒岛上的生活吗? Just imagine being a teacher.想象一下自己是一名教师。 Close your eyes and imagine that you are in a forest.闭上眼睛，想象自己在森林里。 【常见搭配】imagine（sb.）doing sth.想象（某人）做某事。 Imagine +从句 想象..... 例句：She couldn’t imagine living in a place like that .她无法想象住在那样一个地方。 Can you imagine that we could build a beautiful city with rubbish ? 你能想象我们可以用垃圾建一座漂亮的城市吗？ 【拓展】Imagination名词，想象力;想象 例句：With a little imagination, you could tun this place into a palace.稍微动点脑筋，你就能把这个地方变得富丽堂皇。 【即时练习】 1．—Trees are really important to us. —Yes, I can’t ________ living in a world without trees. A．solve B．connect C．describe D．imagine 【答案】D 2．—Can you ________ your life in the future? —Of course. I think I’ll have two children. A．believe B．imagine C．build D．understand 【答案】B 4、In fact without their work about 80 per cent of the plants in the world cannot grow.事实上，如果没有它们的劳作，世界上大约80%的植物都无法生长。 【知识点】 per cent名词，百分之数词加 percent 构成百分数，其中 per cent 无复数形式，与名词连用时，后面需要加of。 例句：Twenty per cent of the students are absent today.今天有 20%的学生缺席。 【拓展】“数词+per cent of十名词”作主语时，谓语动词的数要与of后面的名词的单复数保持一致。 例句：Sixty per cent of the boys in our class like music.我们班 60%的男生喜欢音乐。 Fifteen per cent of the water is polluted.15%的水被污染了。 【即时练习】 1．About 70 percent of the students in our school ________ from the countryside, and they ________ hardworking. A．is; is B．are; are C．is; are D．are; is 【答案】B 5、In order to store honey, they create honeycombs.为了储存蜂蜜，它们构筑蜂巢。 【知识点】in order to 为了;以便后跟动词原形，表示目的，可放在句首或句中。其否定形式为 in order not to 例句：In order to finish the writing, he worked late into the night.为了完成那篇文章，他工作到深夜。 例句：He left quickly in order not to wake the baby.他悄悄地离开，以免吵醒婴儿。 【拓展】in order to 可转换为 in order that 或 so that 引导的目的状语从句。 例句He studied hard in order to pass the exam.=He studied hard in order that/so that he could pass the exam.为了通过考试，他努力学习。 【即时练习】 1．—Why do you practice playing the piano for an hour every day? —________ improve my skills for the coming music competition. A．In order to B．As long as C．In order that 【答案】A 6、Another interesting thing about bees is how they communicate.关于蜜蜂的另一件有趣的事是它们的交流方式。 【知识点】communicate动词，交流;沟通 communicate with sb与某人联系;与某人交流 例句：They seldom communicate openly about their feelings.他们很少开诚布公地交流他们的感受。 I communicate with my friends on social media.我通过社交媒体与我的朋友们交流。 【拓展】communication 名词，交流;交际 例句：Good communication is the key to a successful team.良好的交流是团队成功的关键。 【即时练习】 1．—It’s important to ________ with your parents when you have problems. —You’re right. They can always give you good advice. A．create B．collect C．communicate 【答案】C 2．—How do you usually ________ with your friends? —We often chat on WeChat and sometimes meet up. A．communicate B．compare C．compete D．complete 【答案】A 7、Bees play an important part in the ecosystem of our planet. 蜜蜂在我们地球的生态系统中扮演着重要角色。 【知识点】play a part(in sth) 参与某事，其后可接名词、代词或动词-ing 形式。part 前可用形容词修饰。 例句：Every student can play a part in making the school better.每个学生都能在让学校变得更好中发挥作用。 例句：You can play a part in protecting the environment你可以在保护环境中发挥作用。 【辨析】 play a part in 与 take part in play a part in强调在某个事件中所起的作用或影响 take part in强调参与的行为 例句：Each member of the team played a part in achieving our goal 团队中的每个成员都在实现我们的目标中起了作用。(强调每个成员对实现目标的贡献) Many students took part in the science fair last year.去年许多学生参加了科学展览。(强调学生参与活动的行为) 8、Think about what you can do to protect one of the most amazing animals on earth想想你能做些什么来保护地球上最神奇的动物之一吧。 【知识点】protect动词，保护；防护 protect...from/against...保护......免受 例句：You should learn to protect yourself.你应该学会保护自己。 You should protect your books from getting wet.你应该保护你的书不被弄湿. Protect your plants against pests.保护你的植物不受害虫的侵害。 【拓展】protection名词，保护；防卫 例句：Wearing a helmet is a form of protection for your head.戴头盔是保护头部的一种方式。 【即时练习】 1．It’s important to ________ animals because they are our good friends. A．describe B．attend C．cover D．protect 【答案】D 2．—Lots of people did amazing things to ________ our country during the war. —You are right. They are the great people in our hearts. A．describe B．protect C．decorate 【答案】B 9、importance 重要性 【知识点】importance名词，重要性 the importance of doing sth 做某事的重要性 例句：Anyone can see the importance of good health.人人都知道健康的重要性。 We all know the importance of learning a foreign language well.我们都知道学好一门外语的重要性。 Understanding the importance of doing your homework helps you study better. 理解做作业的重要性有助于你更好地学习。 【拓展】 important 形容词，重要的 例句：I have something important to tell you.我有重要的事告诉你。 【即时练习】 1．—Do you learn how to protect yourself from danger at school? —Of course. We always have lessons about the ________ of safety. A．practice B．chance C．difference D．importance 【答案】D 2．After watching the Victory Day celebration on September 3rd, we are more aware of the ________ of peace. A．difference B．importance C．patience D．sentence 【答案】B 10、disappoint 使失望 【知识点】disappoint 动词，使失望；使破灭。后接名词或代词作宾语。 例句：The weather disappointed our hopes for a picnic.天气使我们的野餐希望破灭。 He disappointed himself by not trying his best. 他因为没有尽力而让自己失望。 【常见搭配】 be disappointed with /in sb./sth .对某人/某事失望。 be disappointed at /by sth .对某事失望。 be disappointed to do sth .对做某事感到失望。 【拓展】 disappointment 名词 失望 Missing the bus was a big disappointment.错过公交车是一件让人非常失望的事。 disappointed 形容词 “失望的”，多用来修饰人 She was disappointed with the gift. 她对这个礼物感到失望。 disappointing 形容词 “令人失望的”，多用来修饰物 The terrible weather was disappointing.这糟糕的天气令人扫兴。 【即时练习】 1．—Did you see Yaming just now? He sat quietly in the classroom alone. —Yeah. He worked hard for the school science competition for weeks and hoped to win first prize. But he lost it, so he looked ________. A．disappointed B．surprised C．unhappy D．worried 【答案】A 2．My parents were ________ that I didn’t do well in the exam. I promised them I would study harder next time. A．disappointed B．proud C．lively D．elderly 【答案】A 11、You may not realize it but frogs play an important role in our planet's ecosystem.你可能没有意识到，但青蛙在我们星球的生态系统中扮演着重要角色。 【知识点】 play a role(in)在....中发挥作用:扮演角色 in为介词,后接名词、代词或动词-ing形式。其中role为名词,意为“作用;职能;角色”,其前可用important、active、key 等词对其含义加以补充说明。 同义表达:play a part in 例句：You played a role in making the party a success.你在使聚会成功中起了作用。 She played an important role in the school play.她在学校戏剧中扮演一个重要的角色。 【辨析】play a part in与 play a role(in) play a part in （在.....中）发挥作用。有参与某事的含义。 play a role(in)（在.....中）扮演角色。 【即时练习】 1．Bees play an important ________ in the ecosystem of our planet. A．game B．role C．part D．B and C 【答案】D 2．In modern society, computers play an important ________ in our lives. A．service B．role C．seat D．rule 【答案】B $