Unit 6 课时4 Developing ideas（listening and speaking）（分层作业）英语新教材外研版八年级下册

**基本信息** 本练习以“基础巩固—能力提升—拓展应用—思维深化”为分层路径，通过词汇默写、语篇理解、综合填空等题型，系统强化“自然与环境”主题语言知识，兼顾语言能力培养与思维品质提升。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础达标|核心词汇（desert等）、短语（solar energy等）|通过单词/词组默写夯实语言基础，对应课时基础目标| |能力提升|语篇理解、逻辑衔接|完形填空（亚马逊河）与六选五（自然与压力）训练上下文分析能力| |拓展培优|跨文化认知、细节推理|阅读理解（自然益处、撒哈拉沙漠）融合文化意识与信息提取| |思维进阶|语法应用、综合表达|短文填空（黄河与尼罗河）综合考查词汇、语法及写作逻辑|

Unit 6 Living with nature 课时4 Developing ideas(listening and speaking)分层作业 核心知识速记 01基础达标 02能力提升 03拓展培优 04思维进阶 词汇 desert/ˈdezət/ n. 沙漠，荒漠 energy/ˈenədʒi/ n. 能源；精力 charge/tʃɑːdʒ/ v.(使) 充电；收费 environment/ɪnˈvaɪrənmənt/ n. 生态环境 resource/rɪˈsɔːs/ n. 资源 短语 1.solar energy太阳能 2.be able to do sth 能够做某事 3.look like看起来像 4. natural resources 自然资源 一、单词默写。 __________ /ˈdezət/ n. 沙漠，荒漠 __________ /ˈenədʒi/ n. 能源；精力 __________ /tʃɑːdʒ/ v.(使) 充电；收费 __________ /ɪnˈvaɪrənmənt/ n. 生态环境 __________ /rɪˈsɔːs/ n. 资源 答案：desert, energy, charge, environment, resource 二、词组默写。 __________太阳能 __________ 能够做某事 __________看起来像 __________ 自然资源 答案: solar energy, be able to do sth, look like, natural resources 一、完形填空 The Amazon is the world’s second longest river. It is about 6,400 kilometres long, just about 250 kilometres 1 than the Nile, but it is one of the widest rivers on earth. It provides South America with lots of 2 . The Amazon is part of a large area called the Amazon Rain Forest that has a lot of plants and animals. In some places, the plants are so thick that sunlight can’t reach the rainforest 3 . The famous explorer Francisco de Orellana gave the river its name. At that time, he and his team met a group of wild women. They made 4 think of an old story about the brave Amazons. Perhaps in order to tell later 5 about these wild women, he named the river the Amazon. The Amazon River is not just a river; it is an important part of the world’s largest rainforest. Thousands of kinds of fish 6 here. The rainforest also has millions of trees. This is 7 people call the “lungs of the earth.” However, the Amazon faces big danger. Every year, people 8 trees for farms and buildings. Pollution from factories and plastic waste also harms the river. Scientists say we must protect the Amazon now, 9 we will lose its beauty and resources forever. What can we do? 10 actions like saving water, recycling, and learning about the rainforest can help. Remember, the Amazon is not just South America’s treasure—it belongs to all of us. 1．A．longer B．wider C．deeper D．shorter 2．A．sand B．water C．sunlight D．air 3．A．pool B．cliff C．floor D．level 4．A．him B．them C．travelers D．it 5．A．inventors B．climbers C．swimmers D．people 6．A．live B．play C．eat D．swim 7．A．when B．why C．how D．what 8．A．put down B．take down C．turn down D．cut down 9．A．and B．but C．or D．so 10．A．Successful B．Simple C．Natural D．Harmful 二、六选五 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。 Nature is the best place to relax and refresh our minds. As busy students, we often feel stressed from classes and homework. However, spending time in natural spaces is a wonderful way to reduce pressure. 1 In our country, there are many amazing natural wonders. The Yangtze River is the longest river in China, known for its grand scenery. And 2 It has nurtured (孕育) ancient Chinese civilization. Both rivers attract millions of visitors every year. Many teenagers love to hike in the mountains or walk along the rivers during holidays. 3 They can breathe fresh air and forget all about their schoolwork. 4 For example, we can have a picnic by the lake, take a walk in the forest, or simply sit on the grass and enjoy the sunshine. If you feel tired, just go outside and let nature heal you. It is a simple but powerful way to stay happy and healthy. Protecting nature is also part of growing up. 5 Let’s work together to build a greener future and enjoy these beautiful places forever. A．It helps us stay relaxed and connected to nature. B．the Yellow River is known as the Mother River of China and plays a vital role in its history. C．We can enjoy nature through small daily actions instead of waiting for big trips. D．Environmental (环境的) protection requires responsibility (责任) and effort from everyone. E．Some people prefer quiet activities like reading or drawing in natural settings. F．We must finish our school tasks first to fully enjoy our outdoor time. 二、阅读理解 A As modern life becomes faster and faster, and technology keeps developing, many people are rediscovering the great benefits of being close to nature. Recent scientific studies have shown something. Local cultures have known it for centuries ( 世纪 ). Spending time in natural environments is good for our bodies and minds. ★ . In 2023, a study came out in the journal Environmental Psychology. The study found something simple. Staying in green spaces for just 20 minutes every day can cut stress by up to 30%. This is really important for teenagers. Teenagers often face heavy school pressure. The researchers also found something about students. Students took short walks in parks during breaks. These students could focus better in class. They also felt less worried. Nature also helps keep all life on Earth alive. Forests take in harmful greenhouse gases. Wetlands clean water. They also stop floods. Bringing nature into daily life can help people learn to cherish the natural world more. You can do this in many ways. You can garden. You can hike. You can just sit under a tree. Even small things work. You can grow plants at home. You can watch birds from a window. These little acts help us feel more connected to the environment. We are facing big environmental problems now. Knowing that nature can help us feel better is meaningful. We build a closer connection with the natural world. We make our own lives better. We also make sure there will be a green future for later generations (后代). 1．What benefit of being close to nature is mentioned in paragraph 1? A．It lowers students’ stress levels. B．It is good for people’s health. C．It keeps all life on Earth alive. D．It can help people cherish nature more. 2．Which sentence can be put in ★ ? A．Nature helps us feel less stressed B．Many people like walking in parks for fun C．Teenagers are suffering from serious stress D．Green spaces are disappearing quickly in cities 3．What does the word “cherish” mean in the passage? A．Explore. B．Protect. C．Clean. D．Treasure. 4．According to Paragraph 4, which activity can help people feel connected to nature? A．Playing online games about forests at home. B．Growing some vegetables in the backyard. C．Buying a lot of flowers from the flower market. D．Reading books about environmental protection. 5．Which would be the best theme (主题) picture of the passage? A． B． C． D． B The Sahara Desert is the largest hot desert in the world. It is about 9,000,000 square kilometers in size. This is almost the size of  America or China. The desert covers eleven countries in the north of Africa. The Nile runs through the Sahara Desert all year round. But there are also other rivers running through it seasonally. The geography of the desert includes huge sand dunes and dune fields. Some of the sand dunes are so huge that they can even be over 152 meters high. But there are also other amazing landforms in different parts of the desert. It is very hot and dry in the Sahara Desert. The temperature there is usually about 30℃. However, during the hottest months, the temperature can go over 50℃. Because of the high temperatures and poor conditions of the desert, only a few plants live here, just about 500 kinds. They also contribute to the limited kinds of animals. In the driest part of the desert, there are only 70 different kinds of animals. Today the Sahara’s population is around 2.5 million. They move from place to place through the desert. Because of this, there are many different cultures and languages in this area. 1．From the first paragraph we can know that the Sahara Desert ________. A．is the same as America in size B．is almost as big as China C．is about 960,000 square kilometers in size D．covers eleven countries in the south of Africa 2．What does the underlined word “They” refer to? A．High temperatures and poor conditions. B．Some plants and animals. C．Huge dunes and dune fields. D．Languages and cultures. 3．What can’t we know about the Sahara Desert? A．Its size. B．Its landforms. C．Its temperatures. D．Its future. 4．What can we learn from the passage? A．There is no water in the Sahara Desert. B．Only the Nile goes through the desert. C．There are only seventy different kinds of plants living there. D．There are different cultures and languages in the Sahara area. 5．Where can we find the passage most probably? A．In a storybook. B．In a sports magazine. C．In a geography book. D．In a health newspaper. 三、短文填空 Ella just had 1 unforgettable trip. She saw the Hukou Waterfall on the Yellow River. She once wondered if the Yellow River was the longest river in China. In fact, the Yangtze River is the longest one in China. It travels the 2 (far) and is about 6,300 kilometres long, while the Yellow River, about 5,464 kilometres long, is the 3 (two) longest. The Yellow River gets 4 (it) name because some 5 (part) of it carry brown and yellow earth. Ella likes learning 6 rivers. Her favourite river is the Nile, the longest river in Africa. It is 6,671 kilometres long and very important in Egypt’s history. Both the Nile 7 the Yellow River played important roles in helping the 8 (develop) of ancient civilizations and remain important today. In China, the Yellow River is even called the “mother river”. We should try our best 9 (protect) them. We should raise our awareness (意识) of environmental protection and take practical action to keep these 10 (wonder) rivers clean and well-preserved for future generations (子孙后代). 1 / 7 学科网（北京）股份有限公司 $ Unit 6 Living with nature 课时4 Developing ideas(listening and speaking)分层作业 核心知识速记 01基础达标 02能力提升 03拓展培优 04思维进阶 词汇 desert/ˈdezət/ n. 沙漠，荒漠 energy/ˈenədʒi/ n. 能源；精力 charge/tʃɑːdʒ/ v.(使) 充电；收费 environment/ɪnˈvaɪrənmənt/ n. 生态环境 resource/rɪˈsɔːs/ n. 资源 短语 1.solar energy太阳能 2.be able to do sth 能够做某事 3.look like看起来像 4. natural resources 自然资源 一、单词默写。 __________ /ˈdezət/ n. 沙漠，荒漠 __________ /ˈenədʒi/ n. 能源；精力 __________ /tʃɑːdʒ/ v.(使) 充电；收费 __________ /ɪnˈvaɪrənmənt/ n. 生态环境 __________ /rɪˈsɔːs/ n. 资源 答案：desert, energy, charge, environment, resource 二、词组默写。 __________太阳能 __________ 能够做某事 __________看起来像 __________ 自然资源 答案: solar energy, be able to do sth, look like, natural resources 一、完形填空 The Amazon is the world’s second longest river. It is about 6,400 kilometres long, just about 250 kilometres 1 than the Nile, but it is one of the widest rivers on earth. It provides South America with lots of 2 . The Amazon is part of a large area called the Amazon Rain Forest that has a lot of plants and animals. In some places, the plants are so thick that sunlight can’t reach the rainforest 3 . The famous explorer Francisco de Orellana gave the river its name. At that time, he and his team met a group of wild women. They made 4 think of an old story about the brave Amazons. Perhaps in order to tell later 5 about these wild women, he named the river the Amazon. The Amazon River is not just a river; it is an important part of the world’s largest rainforest. Thousands of kinds of fish 6 here. The rainforest also has millions of trees. This is 7 people call the “lungs of the earth.” However, the Amazon faces big danger. Every year, people 8 trees for farms and buildings. Pollution from factories and plastic waste also harms the river. Scientists say we must protect the Amazon now, 9 we will lose its beauty and resources forever. What can we do? 10 actions like saving water, recycling, and learning about the rainforest can help. Remember, the Amazon is not just South America’s treasure—it belongs to all of us. 1．A．longer B．wider C．deeper D．shorter 2．A．sand B．water C．sunlight D．air 3．A．pool B．cliff C．floor D．level 4．A．him B．them C．travelers D．it 5．A．inventors B．climbers C．swimmers D．people 6．A．live B．play C．eat D．swim 7．A．when B．why C．how D．what 8．A．put down B．take down C．turn down D．cut down 9．A．and B．but C．or D．so 10．A．Successful B．Simple C．Natural D．Harmful 【答案】 1．D 2．B 3．C 4．A 5．D 6．A 7．D 8．D 9．C 10．B 【导语】本文介绍了亚马逊河的基本情况、名称由来、生态价值，以及当前面临的环境威胁和保护建议，呼吁人们行动起来守护这片 “地球之肺”。 1．句意：亚马逊河是世界第二长河，长约6400公里，仅比尼罗河短约250公里，但却是地球上最宽的河流之一。 结合原文“The Amazon is the world’s second longest river…just about 250 kilometres…than the Nile”，根据常识，尼罗河是第一长河，亚马逊河作为第二长河，长度比尼罗河短，应选用shorter。longer“更长的”、wider“更宽的”、deeper“更深的”均不符合语境。 2．句意：它为南美洲提供了大量的水。 结合语境，河流为大陆提供的是“水”，应选用water。sand“沙子”、sunlight“阳光”、air“空气”均不符合语境。 3．句意：在一些地方，植物非常茂密，阳光无法到达雨林的地面。 结合原文“the plants are so thick that sunlight can’t reach the rainforest…”，阳光无法穿透茂密的植物到达雨林的“地面”，应选用floor。pool“池塘”、cliff“悬崖”、level“水平”均不符合语境。 4．句意：她们让他想起了一个关于勇敢的亚马逊人的古老故事。 结合前文“he and his team met a group of wild women”，此处指代探险家弗朗西斯科·德·奥雷利亚纳，应选用him。them“他们”、travelers“旅行者”、it“它”均不符合指代逻辑。 5．句意：也许是为了告诉后来的人们这些土著女人的故事，他把这条河命名为亚马逊河。 结合语境，他命名河流是为了告诉后来的“人们”，应选用people。inventors“发明家”、climbers“登山者”、swimmers“游泳者”均不符合语境。 6．句意：成千上万种鱼类生活在这里。 结合常识，鱼类“生活”在河流中，应选用live。play“玩耍”、eat“吃”、swim“游泳”均不符合语境。 7．句意：这就是人们所说的“地球之肺”。 结合固定句式“This is what people call…”，表示“这就是人们所说的……”，应选用what。when“何时”、why“为什么”、how“如何”均不符合语法结构。 8．句意：每年，人们砍伐树木来建造农场和房屋。 结合后文“trees for farms and buildings”，人们为了农场和建筑会“砍伐”树木，应选用cut down。put down“放下/镇压”、take down“取下/写下”、turn down“调低/拒绝”均不符合语境。 9．句意：科学家说我们现在必须保护亚马逊河，否则我们将永远失去它的美丽和资源。 结合前后逻辑，“不保护”和“失去”为条件关系，用or表示“否则”，应选用or。and“和”、but“但是”、so“所以”均不符合逻辑。 10．句意：像节约用水、回收利用和了解雨林这样简单的行动都能有所帮助。 结合后文“actions like saving water, recycling, and learning about the rainforest”，这些都是“简单的”行动，应选用Simple。Successful“成功的”、Natural“自然的”、Harmful“有害的”均不符合语境。 二、六选五 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。 Nature is the best place to relax and refresh our minds. As busy students, we often feel stressed from classes and homework. However, spending time in natural spaces is a wonderful way to reduce pressure. 1 In our country, there are many amazing natural wonders. The Yangtze River is the longest river in China, known for its grand scenery. And 2 It has nurtured (孕育) ancient Chinese civilization. Both rivers attract millions of visitors every year. Many teenagers love to hike in the mountains or walk along the rivers during holidays. 3 They can breathe fresh air and forget all about their schoolwork. 4 For example, we can have a picnic by the lake, take a walk in the forest, or simply sit on the grass and enjoy the sunshine. If you feel tired, just go outside and let nature heal you. It is a simple but powerful way to stay happy and healthy. Protecting nature is also part of growing up. 5 Let’s work together to build a greener future and enjoy these beautiful places forever. A．It helps us stay relaxed and connected to nature. B．the Yellow River is known as the Mother River of China and plays a vital role in its history. C．We can enjoy nature through small daily actions instead of waiting for big trips. D．Environmental (环境的) protection requires responsibility (责任) and effort from everyone. E．Some people prefer quiet activities like reading or drawing in natural settings. F．We must finish our school tasks first to fully enjoy our outdoor time. 【答案】1．A 2．B 3．E 4．C 5．D 【导语】本文介绍亲近自然能缓解学习压力、有益身心健康，列举我国江河自然景观与多样的户外休闲方式，同时呼吁大家以日常小事拥抱自然、共同承担责任，保护自然环境。 1．前文说明身处自然能缓解压力、放松身心。A项“It helps us stay relaxed and connected to nature.”顺承上文，进一步说明亲近自然的好处。 2．前文讲长江，后文讲两条河流，B项“the Yellow River is known as the Mother River of China and plays a vital role in its history”衔接长江与黄河，对应后文两条河流。 3．前文讲青少年喜欢爬山、河边散步，E项“Some people prefer quiet activities like reading or drawing in natural settings.”举例不同的户外自然活动，句式逻辑通顺。 4．后文举例湖边野餐、林间散步、草坪晒太阳，都是日常小事，C项“We can enjoy nature through small daily actions instead of waiting for big trips.”总起下文，说明日常小事也能亲近自然。 5．前文说明保护自然是成长的一部分；后文认为一起努力共建绿色未来，D项“Environmental protection requires responsibility and effort from everyone.”引出全民环保、共同努力。 二、阅读理解 A As modern life becomes faster and faster, and technology keeps developing, many people are rediscovering the great benefits of being close to nature. Recent scientific studies have shown something. Local cultures have known it for centuries ( 世纪 ). Spending time in natural environments is good for our bodies and minds. ★ . In 2023, a study came out in the journal Environmental Psychology. The study found something simple. Staying in green spaces for just 20 minutes every day can cut stress by up to 30%. This is really important for teenagers. Teenagers often face heavy school pressure. The researchers also found something about students. Students took short walks in parks during breaks. These students could focus better in class. They also felt less worried. Nature also helps keep all life on Earth alive. Forests take in harmful greenhouse gases. Wetlands clean water. They also stop floods. Bringing nature into daily life can help people learn to cherish the natural world more. You can do this in many ways. You can garden. You can hike. You can just sit under a tree. Even small things work. You can grow plants at home. You can watch birds from a window. These little acts help us feel more connected to the environment. We are facing big environmental problems now. Knowing that nature can help us feel better is meaningful. We build a closer connection with the natural world. We make our own lives better. We also make sure there will be a green future for later generations (后代). 1．What benefit of being close to nature is mentioned in paragraph 1? A．It lowers students’ stress levels. B．It is good for people’s health. C．It keeps all life on Earth alive. D．It can help people cherish nature more. 2．Which sentence can be put in ★ ? A．Nature helps us feel less stressed B．Many people like walking in parks for fun C．Teenagers are suffering from serious stress D．Green spaces are disappearing quickly in cities 3．What does the word “cherish” mean in the passage? A．Explore. B．Protect. C．Clean. D．Treasure. 4．According to Paragraph 4, which activity can help people feel connected to nature? A．Playing online games about forests at home. B．Growing some vegetables in the backyard. C．Buying a lot of flowers from the flower market. D．Reading books about environmental protection. 5．Which would be the best theme (主题) picture of the passage? A． B． C． D． 【答案】1．B 2．A 3．D 4．B 5．C 【导语】本文主要介绍了亲近自然能减轻压力、有益身心健康，同时呼吁人们通过日常小事与自然建立联系，既改善自身生活，也为后代守护绿色未来。 【详解】1．第一段最后一句直接提到“Spending time in natural environments is good for our bodies and minds.”，这与“对人们的健康有益”表述一致。 2．空后的段落核心是：研究发现每天待在绿色空间20分钟，压力可减少30%，学生在公园散步后焦虑感降低、注意力更集中。这都在说明“自然能帮助我们减轻压力”，与A选项的主题完全匹配。 3．根据上下文“Bringing nature into daily life can help people learn to cherish the natural world more.”，结合后文提到的环保行为，此处表达的是“珍视、珍惜”的含义，与treasure的意思最接近。 4．第四段提到“Even small things work. You can grow plants at home.”，B选项“在后院种蔬菜”是种植植物的具体形式，符合“帮助人们与自然建立联系”的描述。 5．文章主题是“亲近自然的好处”，核心是人与自然的连接。选项C的户外、公园/自然场景，最贴合文章主题。 B The Sahara Desert is the largest hot desert in the world. It is about 9,000,000 square kilometers in size. This is almost the size of  America or China. The desert covers eleven countries in the north of Africa. The Nile runs through the Sahara Desert all year round. But there are also other rivers running through it seasonally. The geography of the desert includes huge sand dunes and dune fields. Some of the sand dunes are so huge that they can even be over 152 meters high. But there are also other amazing landforms in different parts of the desert. It is very hot and dry in the Sahara Desert. The temperature there is usually about 30℃. However, during the hottest months, the temperature can go over 50℃. Because of the high temperatures and poor conditions of the desert, only a few plants live here, just about 500 kinds. They also contribute to the limited kinds of animals. In the driest part of the desert, there are only 70 different kinds of animals. Today the Sahara’s population is around 2.5 million. They move from place to place through the desert. Because of this, there are many different cultures and languages in this area. 1．From the first paragraph we can know that the Sahara Desert ________. A．is the same as America in size B．is almost as big as China C．is about 960,000 square kilometers in size D．covers eleven countries in the south of Africa 2．What does the underlined word “They” refer to? A．High temperatures and poor conditions. B．Some plants and animals. C．Huge dunes and dune fields. D．Languages and cultures. 3．What can’t we know about the Sahara Desert? A．Its size. B．Its landforms. C．Its temperatures. D．Its future. 4．What can we learn from the passage? A．There is no water in the Sahara Desert. B．Only the Nile goes through the desert. C．There are only seventy different kinds of plants living there. D．There are different cultures and languages in the Sahara area. 5．Where can we find the passage most probably? A．In a storybook. B．In a sports magazine. C．In a geography book. D．In a health newspaper. 【答案】1．B 2．A 3．D 4．D 5．C 【导语】本文介绍了撒哈拉沙漠的面积、地理特征、气候条件、动植物种类以及人口和文化情况。 【详解】1．第一段指出：“This is almost the size of...China”，说明撒哈拉沙漠的面积几乎和中国一样大。 2．第三段指出：“Because of the high temperatures and poor conditions of the desert, only a few plants live here...They also contribute to the limited kinds of animals.”，因此“They”指代“high temperatures and poor conditions”，即高温以及恶劣的沙漠环境既使此地植物稀少，也（also）进一步造成动物种类有限。 3．文中介绍了撒哈拉沙漠的面积、地形、温度、动植物和人口文化，未提及“未来”。 4．最后一段指出：“there are many different cultures and languages in this area”，说明撒哈拉地区有多种文化和语言。 5．本文介绍了撒哈拉沙漠的地理特征，属于地理类内容，最可能出现在地理书中。 三、短文填空 Ella just had 1 unforgettable trip. She saw the Hukou Waterfall on the Yellow River. She once wondered if the Yellow River was the longest river in China. In fact, the Yangtze River is the longest one in China. It travels the 2 (far) and is about 6,300 kilometres long, while the Yellow River, about 5,464 kilometres long, is the 3 (two) longest. The Yellow River gets 4 (it) name because some 5 (part) of it carry brown and yellow earth. Ella likes learning 6 rivers. Her favourite river is the Nile, the longest river in Africa. It is 6,671 kilometres long and very important in Egypt’s history. Both the Nile 7 the Yellow River played important roles in helping the 8 (develop) of ancient civilizations and remain important today. In China, the Yellow River is even called the “mother river”. We should try our best 9 (protect) them. We should raise our awareness (意识) of environmental protection and take practical action to keep these 10 (wonder) rivers clean and well-preserved for future generations (子孙后代). 【答案】 1．an 2．farthest/furthest 3．second 4．its 5．parts 6．about 7．and 8．development 9．to protect 10．wonderful 【导语】本文主要讲述了艾拉去黄河壶口瀑布游玩的经历，并介绍了中国的长江、黄河以及非洲的尼罗河等著名河流的基本情况及其对人类文明发展的重要作用，呼吁人们保护这些河流。 【详解】1．句意：艾拉刚有了一次难忘的旅行。unforgettable以元音音素/ʌ/开头，且trip为可数名词单数，应使用不定冠词an，泛指“一次难忘的旅行”。 2．句意：它流经的距离最远，大约6300公里长。而黄河全长约5464公里，是第二长的河流。定冠词the后接最高级形式，far的最高级是farthest或furthest。 3．句意：它流经的距离最远，大约6300公里长。而黄河全长约5464公里，是第二长的河流。“the+序数词+longest”意为“第几长”。two是基数词，对应的序数词是second。 4．句意：黄河得名是因为它的一些部分携带着棕黄色的泥沙。修饰名词name，需要用形容词性物主代词。it的形容词性物主代词是its。 5．句意：黄河得名是因为它的一些部分携带着棕黄色的泥沙。前面有some，后面接可数名词复数。part的复数形式是parts。 6．句意：艾拉喜欢了解河流。learn about是固定搭配，意为“了解，学习关于……的知识”。 7．句意：尼罗河和黄河在帮助古代文明发展方面都发挥了重要作用，并且在今天仍然很重要。both...and...是固定搭配，意为“……和……都”。 8．句意：尼罗河和黄河在帮助古代文明发展方面都发挥了重要作用，并且在今天仍然很重要。“the+名词+of”是常见结构，develop的名词形式是development。 9．句意：我们应该尽最大努力保护它们。try one’s best to do sth.是固定搭配，意为“尽某人最大努力做某事”，空处应填不定式to protect。 10．句意：我们应该提高环保意识，采取实际行动，为子孙后代保持这些奇妙的河流清洁和完好。修饰名词rivers，需要用形容词。wonder的形容词形式是wonderful。 1 / 7 学科网（北京）股份有限公司 $