Unit 3 C Trees and us单元限时检测-【初中必刷题】2025-2026学年七年级下册英语同步课件(沪教版·新教材)

该初中英语单元复习课件围绕“Trees and us”主题，系统整合了完形填空、阅读理解、语篇填词及书面表达等语言技能训练，通过语篇导读、题目解析和知识拓展，将树木作用、植物观察、环保行动等核心内容串联，构建“主题-技能-知识”的完整复习网络。 其亮点在于以真实情境（如糖胶树观察、植树活动）为载体，通过“语篇理解-逻辑推理-表达应用”的递进设计，培养学生的语言能力（如书面表达动员稿撰写）和思维品质（如完形填空上下文分析），同时渗透环保意识（文化意识）。分层练习（基础题到拓展题）满足不同学生需求，助力教师精准把握学情，有效提升复习效率。

英 语 七年级下册 HN 1 2 3 Unit 3 Trees and us 4 C 单元限时检测 5 刷速度 6 速度 Ⅰ.完形填空（10分） 素材话题：对糖胶树的观察#1 【2025陕西渭南二模】Li Shuhan, a reporter, enjoys watching the passage （流逝） of time by recording the growth of trees. Lively trees can . .1. . the truth of life. In nature, you don’t have to go far to find new and . .2. . things. You can discover cool things right in your own neighbourhood. Li Shuhan likes to watch a special . .3. . near her home. It’s called the alstonia scholaris tree （糖胶树）.Some people also call it the blackboard tree. 刷速度 返回目录 7 “This tree has pretty white flowers that smell nice,” says Li. She draws pictures of the tree and shares them on social media. Her . .4. . have brought her nearly 54,000 followers. Li really enjoys . .5. . this tree. She’s been looking at the way its flowers are shaped.“The flowers are . .6. ., so I use a magnifying glass （放大镜） to see them better,” Li says. Its evergreen leaves make a nice home for birds and bugs. Li . .7. . this tree shows how wonderful and useful nature is. . .8. . does Li watch trees? Li mentions what a French botanist said, “It helps us get much . .9. . to nature and feel happier. Trees are alive themselves, just like us, and they make the world a better place. Life can be busy and noisy, . .10. . watching a tree can help us feel calm, quiet and thankful for each day,” says Li.#1.5 完形填空·语篇导读 本文主要介绍了一位记者对糖胶树的观察及感受。 刷速度 返回目录 1.( ) A.forget B.decide C.show D.miss C 【解析】句意为：充满生机的树木能够展现生命的真谛。根据句意可知，树能把 生命的真谛展现出来，故选C项。 2.( ) A.similar B.common C.interesting D.weak C 【解析】根据下文的cool things可知，选项C符合语境，故选C项。 3.( ) A.stone B.tree C.flower D.mountain B 【解析】根据下文提到的the alstonia scholaris tree可知，她观察的对象是树， 故选B项。 4.( ) A.pictures B.passages C.reports D.videos A 【解析】根据“She draws pictures of the tree and shares them on social media.”可知，此处表示“画作”，故选A项。 刷速度 返回目录 9 5.( ) A.looking up B.looking for C.looking through D.looking at D 【解析】根据下文“She’s been looking at the way its flowers are shaped.”可知，此处表示观察这棵树，选项D符合语境，故选D项。 6.( ) A.small B.big C.cold D.warm A 【解析】根据下文so I use a magnifying glass to see them better可知，花 很小，选项A符合语境，故选A项。 7.( ) A.plans B.thinks C.stops D.connects B 【解析】句意为：李认为这棵树展示了大自然是多么奇妙和有用。根据句意可知， 此处表示“认为”，故选B项。 刷速度 返回目录 10 8.( ) A.How B.When C.Where D.Why D 【解析】句意为：李为什么观察树木？根据下文李提到的法国植物学家的话以及 观察树木的意义可知，这里问的是她观察树木的原因，故选D项。 9.( ) A.farther B.shorter C.closer D.cooler C 【解析】句意为：这有助于我们更亲近自然并感到更快乐。根据句意可知，这里 表示观察树木能让人们与自然的关系更紧密，故选C项。 10.( ) A.but B.or C.if D.though A 【解析】根据be busy and noisy和“feel calm, quiet and thankful”可知， 设空前后是转折关系，应用连词but，故选A项。 知识拓展 feel thankful for=be grateful for 对……心存感激 刷速度 返回目录 11 Ⅱ.阅读理解（16分） A I love travelling around the world. I find there are different plants in different places. The flame tree is very popular in Africa for several reasons. First, it has beautiful red flowers and lovely green leaves. Second, it’s a big tree and it gives us a lot of shade in summer. Its flowers are very beautiful, aren’t they? However, young trees won’t produce any flowers for about 8 years. 刷速度 返回目录 12 The lychee tree grows widely in the countries of South-east Asia. It produces very sweet fruit. The lychee tree’s fruit is red outside and white inside. Bamboo is very famous in China. We use bamboo in different ways. We can make furniture. We can also use it for making chopsticks and plates. 阅读A篇·语篇导读本文介绍了作者在旅行中发现不同的地方有着不同的植物。 刷速度 返回目录 11.How many kinds of plants are mentioned （提及） in the passage?( ) B A.Two. B.Three. C.Four. D.Five. 【解析】细节理解题。根据文中提到的The flame tree、The lychee tree及 Bamboo可知B项正确。 高分技巧 做细节理解题时，要先通读全文，理解文章大意；然后阅读题目,返回原文找出与 题目相对应的内容，仔细核对，选择符合原文的答案；最后再次阅读并检查。 刷速度 返回目录 14 12.Which is NOT the reason why the flame tree is popular?( ) D A.It has lovely green leaves. B.It’s a big tree and it gives us a lot of shade in summer. C.Its flowers are very beautiful. D.Its fruit is very sweet. 【解析】细节理解题。根据第二段可知选D项。 13.Where does the lychee tree grow widely?( ) C A.In Africa. B.In America. C.In South-east Asia. D.In China. 【解析】细节理解题。 根据第三段的“The lychee tree grows widely in the countries of South-east Asia.”可知C项正确。 刷速度 返回目录 15 14.What can we use bamboo to do?( ) D A.To make furniture. B.To make chopsticks and plates. C.To make flowers and fruits. D.Both A and B. 【解析】细节理解题。根据最后一段的“We use bamboo in different ways.We can make furniture.We can also use it for making chopsticks and plates.” 可知D项正确。 刷速度 返回目录 16 B 【2025辽宁沈阳期末】Some trees drop their leaves every year. Their leaves grow back again in spring. Scientists think that plants don’t want things they can’t use. When leaves have lost their chlorophyll （叶绿素）, they fall off. A leaf’s chlorophyll uses sunlight to make sugar out of water and carbon dioxide. Plants need carbon dioxide to live and grow. When leaves use carbon dioxide, another gas, called oxygen, is left over. The plant can’t use the oxygen, so it lets the oxygen go. 刷速度 返回目录 17 Animals and humans need oxygen to live. Their bodies use the oxygen, and what do you think they have left over? Carbon dioxide. When animals and humans breathe out, they let the carbon dioxide go. It’s easy to see that plants and animals and humans help each other in this way. In places where it gets cool in autumn, a plant loses its chlorophyll, and its leaves may turn yellow or red. Lutein （叶黄素）, which makes the leaves yellow, was there all summer, but there was so much chlorophyll that the yellow colour didn’t show until the green colour went away. Yellow leaves turn red only if they have lots of sugar in them and the sunlight shines on them. The more sugar a leaf has, the redder it becomes. If a leaf is kept in the shade （阴凉处）, it will stay yellow even if it has a lot of sugar.#1.5 阅读B篇·语篇导读 本文主要介绍了树叶进行光合作用和颜色变化的科学原理。 刷速度 返回目录 15.Which of the following has no effect on the production of sugar in trees?( ) D A.Chlorophyll. B.Sunlight. C.Water. D.Oxygen. 【解析】细节理解题。根据文章第三段的“A leaf’s chlorophyll uses sunlight to make sugar out of water and carbon dioxide.”可知，叶绿素通 过阳光、水和二氧化碳制造糖分，没有氧气。故选D项。 刷速度 返回目录 19 16.What stops the yellow colour from being shown?( ) A A.Chlorophyll. B.The temperature. C.The height of the tree. D.The weight of the tree. 【解析】细节理解题。根据文章第五段的“Lutein, which makes the leaves yellow, was there all summer, but there was so much chlorophyll that the yellow colour didn’t show until the green colour went away.”可知， 叶绿素的绿色掩盖了叶黄素的黄色。故选A项。 刷速度 返回目录 20 17. 文章出处 Where is the text most probably from?( ) B A.A storybook. B.A science magazine. C.A travel guide. D.A dictionary. 【解析】推理判断题。全文围绕树叶进行光合作用和颜色变化的科学原理展开， 所以文章有可能源自科学杂志。故选B项。 18.What’s the best title of the text?( ) D A.Effect of Sugar in Leaves B.The Importance of Sunlight C.Carbon Dioxide and Oxygen D.The Secrets of Leaves 【解析】主旨大意题。通读全文可知，本文主要介绍了树叶进行光合作用和颜色 变化的科学原理，D项（树叶的秘密）可作为最佳标题。故选D项。 刷速度 返回目录 21 Ⅲ.阅读还原（10分） 【2024辽宁沈阳期中·改编】Sarah is a junior high school student in England. She is in Grade Seven. This term she studies a new subject— Biology.19.___ She knows that plants help people a lot in class. But every year， people cut down lots of trees. She wants to do something.20.___ It is Project Green. Now there are only 4 students in the club.21.___ They meet every Saturday morning and go to plant trees in the parks. They know planting trees is a good way to help the environment.22.___ Ms Lee， the head teacher， is very happy when she hears about what they are doing. She meets Sarah and gives her some good ideas.23.___ “It’s what I want too，” Sarah thanks Ms Lee and says.#1.2 B F C E A 刷速度 返回目录 22 A.Ms Lee says she hopes more students will join the club. B.She learns about plants in the Biology class. C.They plant trees every week. D.Sarah enjoys reading books with her friends. E.And it is fun for them to make new friends in the parks. F.So she sets up a club in her school. 阅读还原·语篇导读 本文主要讲述了一名中学生和她的同学为保护环境所做的事情。 刷速度 返回目录 23 19. ___ B 【解析】根据前文“This term she studies a new subject—Biology.”和后文 “She knows that plants help people a lot in class.”可知，此处和生物课 以及植物有关。故选B项。 20. ___ F 【解析】根据前文“She wants to do something.”可知，空处应是她做的具体 的事情。F项符合语境。故选F项。 21. ___ C 【解析】根据前文“Now there are only 4 students in the club.”以及后文 “They meet every Saturday morning and go to plant trees in the parks.” 可知，空处应是介绍俱乐部成员做的事情。故选C项。 刷速度 返回目录 24 22. ___ E 【解析】根据前文“They know planting trees is a good way to help the environment.”可知，空处也应是介绍在公园植树的好处。故选E项。 23. ___ A 【解析】根据后文中的It’s what I want too可知，空处应是李老师的一个想法。 故选A项。 刷速度 返回目录 25 Ⅳ.语篇填词（5分） 【2025广东广州期中】Trees are important in our daily lives. They can 24.c _______ oxygen for us to breathe and take in harmful gases. They are also major fighters 25.a ________ air pollution. So it is necessary for us to protect trees. How can we protect them? I’d like to give you some 26.a _______.Firstly, we can plant more trees to keep the environment green. Secondly, we should use both sides of paper and also 27.e __________ our friends to do so. Finally, we can use fewer ungreen 28.p ________ bags. Let’s start out small and make the Earth more beautiful. reate gainst dvice ncourage lastic 语篇填词·语篇导读 本文主要介绍了树木的作用以及如何保护树木。 刷速度 返回目录 26 24. ________ create 【解析】句意为：它们可以为我们创造氧气来呼吸，并吸收有害气体。根据 oxygen for us to breathe和首字母提示可知，create符合语境；情态动词can后 接动词原形，故填create。 25. _________ against 【解析】句意为：它们也是对抗空气污染的主要斗士。根据句意和首字母提示可 知，树木可以对抗空气污染。故填against。 刷速度 返回目录 27 26. ________ advice 【解析】句意为：我想给你们一些建议。根据句意并结合首字母可知是给出一些 建议，advice为不可数名词，故填advice。 链接狂K advice的详细讲解见狂K重点P2。 27. ___________ encourage 【解析】句意为：第二，我们应该使用纸张的两面，并且鼓励我们的朋友也这样 做。根据句意和首字母提示可知，encourage（鼓励）符合语境；should后接动词 原形，故填encourage。 28. _________ plastic 【解析】句意为：最后，我们可以少使用不环保的塑料袋。根据ungreen和首字母 提示可知，此处表示“塑料袋”，故填plastic。 刷速度 返回目录 28 Ⅴ.书面表达（25分） 29.你们学校决定组织一次主题为“Planting Trees for the Earth”的植树活动。假设 你是班长，你要动员你班同学参加这次活动，请你写一篇不少于80词的英文发言稿。 要点：（1）我国的森林覆盖率（coverage rate）低，近年来情况有所改善； （2）树可以吸收有害气体，保持空气清新,防止水土流失； （3）保护树木的建议（至少2点）。 Dear fellow students, Forests are important to the environment.____ 刷速度 返回目录 29 【参考范文】 Dear fellow students, Forests are important to the environment.We should plant more trees for the Earth. At present, the coverage rate of forests in China is low, but the situation has improved in recent years.Trees can take in harmful air and keep the air fresh.Trees can prevent water and soil loss.To protect the Earth, people should take action as soon as possible. I have some advice.First, people should plant more trees around the world.Second, people should stop cutting down too many trees. Let’s try our best to protect the Earth! 刷速度 返回目录 30 【解析】易混辨析 stop doing sth表示停止正在做的事；stop to do sth表示停下正在做的事，去 做另一件事。 刷速度 返回目录 31 $