2026年新教材外研版九年级上册英语Unit 5 A fine balance单元提升测试卷（含答案）

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2026年新教材外研版九年级上册英语Unit 5 A fine balance单元提升测试卷（考试时间80分钟 满分：100分）一、单项选择（共 10 小题，每小题 1 分，满分 10 分）The ecosystem ______ is made up of plants and animals needs to stay in good balance.A. who B. whoseC. whom D. which Human activities have a great ______ on the balance of nature.A. influence B. ability C. difficulty D. differenceTrees play an important role in ______ the air fresh and clean.A. keep B. keeping C. kept D. to keepPeople have cut down too many trees, ______ many wild animals lose their homes.A. leading to B. depending onC. sticking to D. giving upWe must protect the environment ______ being polluted by waste and smog.A. for B. from C. with D. aboutThe rapid development of cities is ______ to some vulnerable wild ecosystems.A. peaceful B. helpful C. valuable D. harmfulThe clean water and fresh air ______ we need to live are parts of nature’s balance.A. what B. who C. that D. whereIf we want nature to ______ in balance, we must stop destroying wild land.A. stay B. turn C. get D. takeMany endangered animals depend ______ the complete ecosystem to survive.A. in B. on C. with D. forSmall green actions can ______ positive changes to our living environment.A. bring B. take C. make D. give二、完形填空（共 10 小题，每小题 1.5 分，满分 15 分）Nature is a big system 11______ includes all living things and natural resources. It keeps a natural balance as long as humans do not destroy it. However, human activities have greatly changed our planet in recent years.Every year, large numbers of trees are cut down for farmland and buildings. Such activities are harmful 12______ local ecosystems. They not only rob wild animals of their homes but also 13______ to serious air pollution and smog. Human behaviors have a great influence 14______ the living conditions of wild creatures.Thankfully, more people have realized the 15______ of protecting natural balance. Forests, rivers and wildlife all play important roles 16______ keeping the earth healthy. Every part of nature matters, and small changes in one area can 17______ the whole ecosystem.Now schools and communities encourage people to live a green life. We are taught to protect nature 18______ avoid wasting natural resources. Teenagers can also make a difference. By saving water, reducing waste and planting trees, we can help nature 19______ its natural balance.Protecting nature is protecting ourselves. Only by living in harmony with nature can we have a 20______ future.A. who B. which C. whom D. whoseA. to B. for C. with D. inA. lead B. leads C. leading D. ledA. in B. at C. on D. ofA. importance B. difficulty C. difference D. suggestionA. on B. at C. in D. forA. effort B. effect C. afford D. affectA. but B. and C. so D. orA. keep B. take C. make D. turnA. difficult B. dangerous C. terrible D. safer三、阅读理解（共 15 小题，每小题 2 分，满分 30 分）AThe Fine Balance of NatureNature consists of various living things and natural resources, and all parts work together to maintain a fine balance. Every plant and animal has its own place in the ecosystem, and none of them is useless.In forests, small insects feed birds, while birds control the number of insects to prevent plants from being destroyed. Plants produce fresh oxygen and offer shelter for small animals. This natural cycle keeps the whole ecosystem healthy and stable.However, human activities are breaking this balance. Cutting down trees, polluting rivers and overusing natural resources cause many environmental problems. Wildlife is disappearing, farmland is damaged and more ecosystems are facing great danger.In recent years, more people have begun to pay attention to environmental protection. The government has made rules to reduce pollution, and many volunteers take part in tree-planting and wildlife protection activities. These efforts help nature return to its balanced state.Natural balance is the basis of human survival. Protecting nature is protecting all living things on the earth, as well as our own future.What does the natural ecosystem depend on to keep stable?A. Human endless developmentB. More human activitiesC. Constant pollution and changeD. The balanced cooperation of all living thingsThe underlined word “stable” in Paragraph 2 means ______.（词义猜测）A. 脆弱的 B. 稳定的C. 快速的D. 危险的Which of the following is NOT the result of breaking natural balance?A. Worse pollution B. Disappearing wildlife C. Better ecosystem D. Damaged farmlandWhat is the writer’s attitude towards environmental protection?（态度判断）A. Supportive B. Doubtful C. UninterestedD. Worried and hopelessWhat is the main idea of the passage?（主旨归纳）A. The types of wild animals in forestsB. How human activities destroy citiesC. The importance of natural balance and protectionD. The development of modern technologyBTeenagers’ Green Actions MatterMany students believe that environmental protection is a task for adults, scientists and the government. In fact, teenagers’ daily small actions also matter a lot and can positively influence the balance of nature.Natural balance is easy to break but hard to repair. Wasting water, throwing rubbish casually and destroying young trees will damage local ecosystems. These small bad habits will finally cause serious environmental problems. On the contrary, daily green actions can gradually improve our living environment.Many schools now hold environmental-themed activities. Students learn how ecosystems work and why natural balance is so important. They join tree-planting activities, learn waste sorting and experience low-carbon life.These activities help students build environmental awareness. We begin to understand that nature is not unlimited resources for human use. We must live in harmony with nature and protect vulnerable ecosystems.Small actions bring big changes. Teenagers’ long-term green efforts can effectively protect natural balance and make our planet better.What do many teenagers think of environmental protection at first?A. It is everyone’s dutyB. It is only a task for professionals and governmentsC. Small actions are helpfulD. It is easy to repair damaged natureWhat bad effect will daily bad habits bring?A. Improve ecosystem balanceB. Reduce natural pollutionC. Help wild animals surviveD. Cause big environmental problemsWhat do school environmental activities help students do?A. Waste more natural resourcesB. Understand the value of natural balanceC. Ignore ecological problemsD. Develop bad living habitsThe underlined phrase “low-carbon life” means ______.（词义猜测）A. 低碳环保生活B. 高消耗生活C. 快速节奏生活D. 简约饮食生活What is the best title for Paragraph B?A. The Dangers of Natural PollutionB. How students break ecosystem balanceC. Teenagers’ small actions protect natural balanceD. The difficulty of environmental repairCLive in Harmony with NatureThe earth’s ecosystem is a complete system made up of land, water, air and all living creatures. It keeps a fine balance and supports all lives on the planet. But fast human development has greatly changed natural conditions.Many people focus only on economic development and ignore ecological protection. They cut down forests for more land, pollute rivers with waste water and produce plenty of smog. These harmful activities destroy animals’ living environments and make many species endangered.Environmental experts warn that broken ecological balance will finally harm humans. Dirty water and air cause illnesses, and lost forests lead to extreme weather. Humans cannot live well without a balanced nature.It is never too late to protect the environment. We do not need great deeds. Long-term small green actions are enough. Saving water, using less plastic, protecting plants and choosing green travel are all easy and useful ways.Living in harmony with nature brings us sustainable development. A balanced natural environment offers humans a stable and bright future.What is the feature of the earth’s ecosystem?A. It is an independent and balanced whole systemB. It is easily destroyed by animal activitiesC. It has no connection with human lifeD. It can repair itself without any protectionWhy do many wild animals become endangered?A. Because people protect them too muchB. Because there is enough natural resourceC. Because the ecosystem is too stableD. Because human activities destroy their living environmentWhat will happen if nature balance is broken?A. Better living conditions B. Health risks and extreme weatherC. More wild species D. Cleaner environmentWhat does the writer advise people to do?A. Focus only on economic developmentB. Ignore ecological problemsC. Take simple and lasting green actionsD. Use natural resources without limitWhat is the main purpose of the passage?A. To introduce different kinds of wild animalsB. To warn people to protect natural ecological balanceC. To show the rapid development of societyD. To explain the formation of natural smog四、语法填空（共 10 小题，每小题 1.5 分，满分 15 分）Nature is a wonderful system 36______ keeps a fine balance for all living things. It 37______ (be) made up of forests, rivers, animals and plants. All natural things play important roles in 38______ (keep) our planet healthy.Human activity is the main factor 39______ breaks natural balance. Cutting down trees and polluting water are 40______ (harm) to ecosystems. Such behaviors have a bad influence 41______ wildlife survival and leads 42______ more environmental problems.Now more people realize the importance of 43______ (protect) nature. We should try our best to stop damaging the environment. Small green actions can help nature 44______ (return) to a balanced state. Let’s work together to build a greener and 45______ world.36. ________ 37. ________ 38. ________ 39. ________ 40. ________41. ________ 42. ________ 43. ________ 44. ________ 45. ________五、任务型阅读（共 5 小题，每小题 2 分，满分 10 分）阅读短文，完成表格，每空限填一词。Protect Natural Balance, Protect Our HomeThe natural ecosystem is a complete system that keeps balanced naturally, offering resources and living space for all living things. However, human activities easily break this balance and cause different kinds of environmental problems.Large numbers of trees are cut down, which destroys wild animals’ homes. Waste water and smoke pollute water sources and air seriously. These bad behaviors greatly influence the ecological environment and make nature lose its balance.To solve these problems, everyone should take responsibility. We need to prevent nature from being damaged, stick to low-carbon life and take small but useful green actions. Only in this way can we keep the ecosystem stable and enjoy a better living environment.46. ________ 47. ________ 48. ________ 49. ________ 50. ________六、书面表达（满分 20 分）题目：Protect Nature, Keep Natural Balance写作要求：内容完整包含三点：①自然生态平衡的重要性；②人类破坏生态的常见行为与危害；③青少年保护环境、守护生态平衡的具体做法；至少使用4个单元核心短语：stay in balance、be made up of、play an important role in、have an influence on、lead to、be harmful to（任选其四）；语法要求：必须使用至少1个that/which引导的定语从句；词数100-120，句式丰富、逻辑清晰，合理使用复合句与非谓语动词，不得出现真实校名、人名。Protect Nature, Keep Natural Balance________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________参考答案一、单项选择D ：which引导定语从句，先行词为事物ecosystem，从句作主语。A ：have an influence on 对……有影响。B ：play a role in doing sth. 在做某事中发挥作用，in后接动名词。A ：leading to 导致，现在分词作结果状语。B ：protect...from... 保护……免受……伤害，固定搭配。D ：be harmful to 对……有害。C ：that引导定语从句，可修饰并列事物先行词，在从句中作宾语。A ：stay in balance 保持平衡，固定短语。B ：depend on 依靠、依赖，固定搭配。A ：bring...to...，表示“给……带来……”，固定搭配。二、完形填空B 解析：先行词system为事物，which引导定语从句并作主语。A 解析：be harmful to 对……有害。A 解析：本句主语是They指代前文的Such activities，为复数，not only后是动词原形rob，but also并列谓语也应使用动词原。C 解析：have an influence on 对……产生影响，固定搭配。A 解析：realize the importance of 意识到……的重要性，贴合语境。C 解析：play roles in doing sth. 在做某事方面起作用，固定用法。D 解析：affect为动词，意为“影响”，符合句子谓语需求；effect为名词，不能作谓语。B 解析：并列连词and，连接两个并列动作protect和avoid。A 解析：keep balance 保持生态平衡。D 解析：safer更安全的，守护自然能换来更安全的未来。三、阅读理解A篇21.D 22.B 23.C 24.A 25.CB篇26.B 27.D 28.B 29.A 30.CC篇31.A 32.D 33.B 34.C 35.B四、语法填空which/that（定语从句修饰事物system，在从句中作主语）is（一般现在时，主语it为单数，谓语动词用单数形式）keeping（介词in后接动名词形式）which/that（定语从句修饰事物factor，在从句中作主语）harmful（be harmful to 为固定搭配，意为“对……有害”）on（have an influence on 固定短语，意为“对……有影响”）to（lead to 固定搭配，意为“导致；引起”）protecting（介词of后接动名词作宾语）return（help...do sth. 固定用法，省略不定式符号to）safer（and连接并列比较级，与greener对应）五、任务型阅读46.cut 47.polluted 48.balance 49.action 50.low六、书面表达Protect Nature, Keep Natural BalanceNature is a complete system which is made up of plants and animals. It stays in natural balance and plays an important role in our life.However, many human actions are harmful to nature. Cutting down too many trees and polluting water resources lead to ecological damage. This has a bad influence on our living environment and breaks the balance of nature.As teenagers, we should take action to protect nature. We can save water, reduce rubbish and plant more trees in our free time. Small green actions can help nature stay in balance and make our world more beautiful.Ecological ProblemsProtective WaysTrees are 46______ down widelyTake 49______ of small green actionsWater and air are 47______ seriouslyStick to 50______-carbon daily lifeNature loses its natural 48______Protect nature and keep ecosystem stable