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八年级英语（外研版）下册单元练习卷
Unit 5 Looking into nature
（满分：100 分 考试时间：90 分钟）
一、单项选择（共 15 小题；每小题 1 分，满分 15 分）
从 A、B、C、D 四个选项中，选出可以填入空白处的最佳选项。
Scientists observe nature closely ______ how living things change over time.
A. understand B. to understand C. understanding D. understood
Charles Darwin is famous ______ his theory of evolution.
A. for B.as C. of D. with
The scientist spent 30 years ______ birds in the Amazon rainforest.
A. study B. to study C. studied D. studying
Species ______ over millions of years to survive in changing environments.
A. evolve B. evolves C. have evolved D. will evolve
The ability to adapt ______ new environments is key to survival.
A. for B. with C. at D. to
This rare plant can only be found in a few ______ of the rainforest.
A. areas B. area C. area's D. areas'
The scientist ______ binoculars to watch the birds without disturbing them.
A. used B. use C. uses D. using
Many young scientists decide to ______ a career in biology.
A. take B. make C. do D. pursue
The documentary shows ______ dolphins communicate with each other.
A. what B. how C. where D. when
Darwin ______ that all species share a common ancestor.
A. suggested B. created C. invented D. discovered
If we want to protect nature, we must first understand ______ it works.
A. why B. how C. what D. which
The research team ______ the behavior of ants for over five years.
A. records B. recorded C. has recorded D. will record
Jane Goodall is known for ______ chimpanzees in the wild.
A. study B. to study C. studied D. studying
The scientist uses a special camera ______ the animals at night.
A. watch B. to watch C. watching D. watched
______ is important for us to observe nature with an open mind.
A. This B. That C. It D. There
二、选词填空（共 6 小题；每小题 1 分，满分 6 分）
从方框中选择恰当的单词，并用其适当形式填空。每词限用一次。
Scientists have _________ the behavior of wolves for decades.
Animals must _________ to changes in their environment to live.
Darwin's _________ of evolution changed the way we understand life.
Some species have _________ over millions of years into new forms.
The research team _________ data on bird migration every spring.
Without the ability to hide from danger, few animals would _________.
三、词性转换（共 8 小题；每小题 1 分，满分 8 分）
根据句子意思，用括号中所给单词的适当形式填空。
The scientist's _________ changed the way we think about nature. (discover)
Darwin was a famous _________ who studied living things. (natural)
The _________ of this species to cold weather is amazing. (adapt)
The documentary provides a detailed _________ of how bees build their hives. (describe)
The young scientist was _________ about the results of her research. (excite)
The _________ of the birds can tell us a lot about their health. (behave)
The teacher explained the concept of evolution in a very _________ way. (understand)
Many _________ species are protected by law in this country. (endanger)
四、句型转换（共 6 小题；每小题 1 分，满分 6 分）
按要求改写下列句子，每空一词。
Darwin studied birds on the Galapagos Islands. He developed his theory of evolution.（合并为一句，用动词不定式）
Darwin studied birds on the Galapagos Islands _________ _________ his theory of evolution.
The scientist observed the chimpanzees for ten years.（改为被动语态）
The chimpanzees _________ _________ by the scientist for ten years.
Jane Goodall is famous because she studied chimpanzees in the wild.（改为同义句，用 for）
Jane Goodall is famous _________ _________ chimpanzees in the wild.
The researcher has spent five years studying the migration of butterflies.（对划线部分提问）
_________ _________ has the researcher spent studying the migration of butterflies
We should observe nature with an open mind.（改为否定句）
We _________ _________ observe nature with an open mind.
The scientist uses a special device to record animal sounds at night.（改为同义句，用 by doing）
The scientist records animal sounds at night _________ _________ a special device.
五、阅读理解（共 5 篇；A/B/C/E 篇每小题 1.5 分，D 篇每小题 2 分，满分 35 分）
A
根据短文内容，判断下列句子是否符合短文内容。符合的选 “T”，不符合的选 “F”。（共 5 小题；每小题 1.5 分，满分 7.5 分）
Darwin's Great Discovery
Charles Darwin was a British naturalist who changed the way we understand life on Earth. In 1831, he set sail on a ship called the Beagle. The journey lasted five years. During this time, Darwin visited many places around the world, including the Galapagos Islands.
On the Galapagos Islands, Darwin noticed something strange. The finches on the islands were similar to those on the mainland, but their beaks were different. On some islands, finches had thick beaks for cracking seeds. On others, they had thin beaks for catching insects. Darwin wondered why.
Darwin realized that the finches had adapted to their environment over time. Birds with beaks that were better suited to the food on their island were more likely to survive and pass on their traits. This process is called natural selection.
After returning to England, Darwin spent 20 years studying his notes and developing his theory. In 1859, he published his book On the Origin of Species. The book explained how species evolve over time through natural selection. Today, Darwin's theory is one of the most important ideas in science.
Darwin's journey on the Beagle lasted five years.
Darwin noticed that finches on different islands had the same beaks.
Birds with beaks that were better suited to their environment were more likely to survive.
Darwin published his book On the Origin of Species in 1831.
Darwin's theory of evolution is still important in science today.
B
阅读下面短文，从各题所给的 A、B、C、D 四个选项中，选出最佳选项。（共 5 小题；每小题 1.5 分，满分 7.5 分）
What Makes a Scientist
What makes someone want to become a scientist For many, it starts with curiosity — a deep desire to understand how the world works. Young scientists spend hours observing nature, asking questions, and looking for answers.
Observing carefully
Scientists are keen observers. They notice small details that others might miss. For example, Jane Goodall noticed that chimpanzees use tools — a behavior that was once thought to be unique to humans. This discovery changed our understanding of animals.
Asking questions
Good scientists ask questions constantly. Why do birds migrate How do ants find their way home What makes some plants grow in certain places These questions drive research and lead to new discoveries.
Testing ideas
Scientists don't just guess — they test their ideas. They design experiments, collect data, and analyze results. If the evidence does not support their idea, they change their thinking. This process is called the scientific method.
Never giving up
Science is not always easy. Experiments fail. Ideas turn out to be wrong. But great scientists keep trying. Thomas Edison failed thousands of times before inventing the light bulb. He said, "I have not failed. I've just found 10,000 ways that won't work."
If you love asking questions and finding answers, you already have the heart of a scientist. Keep observing, keep asking, and never stop exploring.
What is the first step to becoming a scientist according to the passage
A. Having a deep curiosity. B. Reading many books.
C. Going to a good school. D. Having a good memory.
What did Jane Goodall discover about chimpanzees
A. They can speak like humans. B. They use tools.
C. They live in groups. D. They eat only plants.
What does the scientific method involve
A. Only making guesses.
B. Reading other scientists' work.
C. Memorizing facts.
D. Designing experiments and testing ideas.
What did Thomas Edison say about his failures
A. He was very sad about them. B. He never failed at all.
C. He learned from them. D. He gave up after failing.
What is the main purpose of this passage
A. To describe famous scientists.
B. To explain what makes a scientist.
C. To teach how to do experiments.
D. To promote science competitions.
C
阅读下面短文，从各题所给的 A、B、C、D 四个选项中，选出最佳选项。（共 5 小题；每小题 1.5 分，满分 7.5 分）
How Scientists Track Wild Animals
Have you ever wondered how scientists know where wild animals go For many years, tracking animals was very difficult. Scientists had to follow animals on foot or watch them from a distance. But today, technology has changed everything.
GPS Tracking
One of the most important tools for tracking animals is the GPS tracker. Scientists attach small GPS devices to animals' bodies. These devices send signals to satellites. The satellites then send the animal's location back to the scientists. GPS tracking has helped scientists learn amazing things. They have discovered that sea turtles travel thousands of kilometers across the ocean. They have learned that wolves can walk up to 50 kilometers in one night.
Camera Traps
Another useful tool is the camera trap. These cameras are placed in forests or other wild areas. They take pictures when they sense movement. Camera traps have captured images of rare animals that scientists had never seen before. In 2024, a camera trap in Indonesia captured the first-ever image of a rare rabbit species.
Where do we go from here
New technology is being developed every day. Scientists are now testing tiny sensors that can be attached to insects. They are also using drones to follow animals from the sky. With these tools, we can learn more about nature than ever before.
What is the main idea of the first paragraph
A. Tracking animals used to be easy.
B. Technology has made tracking animals easier.
C. Scientists do not need to track animals anymore.
D. GPS was invented for tracking animals.
How does GPS tracking work
A. GPS devices send signals to satellites.
B. Scientists follow the animals on foot.
C. Scientists watch animals from a distance.
D. Animals carry phones that send messages.
What did scientists discover about sea turtles using GPS
A. They swim very fast. B. They eat sea plants.
C. They live in groups. D. They travel long distances.
When was the first image of a rare rabbit species captured in Indonesia
A. In 2022. B. In 2023. C. In 2024. D. In 2025.
What are scientists testing now according to the passage
A. Bigger camera traps. B. Tiny sensors for insects.
C. Faster satellites. D. New kinds of batteries.
D
阅读下面短文，从方框内所给的选项中选出能填入空白处的最佳选项，使短文意思通顺。选项中有一项为多余选项。（共 5 小题；每小题 2 分，满分 10 分）
The Galapagos Islands: A Living Laboratory
The Galapagos Islands are a group of islands in the Pacific Ocean. 51_________ They are home to many unique animals and plants that cannot be found anywhere else on Earth.
Darwin's visit to the islands in 1835 was a turning point in his life. 52_________ He spent five weeks studying the animals and plants there. He collected samples of birds, reptiles, and plants.
What made the Galapagos so special was the difference between the islands. 53_________ For example, tortoises on different islands had different shell shapes. Finches on different islands had different beak shapes.
Darwin realized that these differences were caused by adaptation. 54_________ Over time, they developed traits that helped them survive in their specific environment.
Today, the Galapagos Islands are a protected area. 55_________ Scientists continue to study the islands to learn more about evolution and adaptation.
E
阅读下面短文，回答下列问题。（共 5 小题；每小题 1.5 分，满分 7.5 分）
Young Scientists Making a Difference
Not all scientists are adults. Around the world, young people are making important discoveries and helping us understand nature better.
A 14-year-old who discovered a new species
In 2025, a 14-year-old student named Jackson found a new species of beetle in his backyard. He was looking for insects under a log when he saw a beetle he had never seen before. He took pictures and sent them to a local university. Scientists confirmed that it was a new species.
A teenager who helped save turtles
When Rohan was 15, he noticed that baby sea turtles were dying because they could not find their way to the ocean. Bright lights from nearby buildings confused them. Rohan started a campaign to turn off lights near the beach during turtle nesting season. The number of baby turtles that reached the ocean increased by 50%.
What can you do
You don't have to wait until you grow up to become a scientist. Start by observing nature around you. Keep a notebook of what you see. Ask questions and look for answers. You never know what you might discover.
What did Jackson discover in 2025
Where did Jackson find the beetle
Why were baby sea turtles dying
What did Rohan do to help the turtles
What advice does the passage give to young people
六、情景交际（共 5 小题；每小题 1 分，满分 5 分）
从方框中选择恰当的句子补全对话。有一项为多余选项。
Mike: Hi, Lisa. What do you want to be when you grow up
Lisa: I want to become a scientist.
Mike: 61_________
Lisa: Because I love observing nature and finding answers to questions.
Mike: 62_________
Lisa: I would like to be a biologist. 63_________
Mike: That's interesting. I am more interested in animals.
Lisa: 64_________ We could work together on a project one day.
Mike: 65_________ Let's keep studying hard and make our dreams come true.
七、句子翻译（共 5 小题；每小题 2 分，满分 10 分）
根据中文提示，完成下列英语句子。每空词数不限。
查尔斯 达尔文以其进化论而闻名。
Charles Darwin is _________ _________ his theory of evolution.
科学家们花了十年时间观察这个地区的鸟类。
Scientists _________ ten years _________ birds in this area.
适者生存是自然选择的核心思想。
Survival of the fittest is the key _________ of natural selection.
珍 古道尔因研究野生黑猩猩而出名。
Jane Goodall is known for _________ chimpanzees in the wild.
观察自然并问问题是学习科学的最佳方式。
_________ nature and asking questions is the best way to learn science.
八、书面表达（满分 10 分）
假设你校英语报正在举办 “Looking into Nature” 主题征文活动。请你根据以下提示，写一篇 70 词左右的英语短文，分享你对自然观察的理解或经历。
内容提示：1. 你曾经观察过什么自然现象或动物？（至少 1 个例子）2. 你从这次观察中学到了什么？（至少 2 点）3. 你对未来有什么计划或愿望？
要求：语言通顺，语法正确，书写规范；包含所有要点，可适当发挥；不得出现真实姓名和学校名称。
参考答案
一、单项选择（每小题 1 分，共 15 分）
题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
答案 B A D C D A A D B D B C D B C
二、选词填空（每小题 1 分，共 6 分）
题号 16 17 18 19 20 21
答案 observed adapt theory evolved records survive
三、词性转换（每小题 1 分，共 8 分）
题号 22 23 24 25 26 27 28 29
答案 discovery naturalist adaptation description excited behavior understandable endangered
四、句型转换（每小题 1 分，共 6 分）
题号 30 31 32 33 34 35
答案 to develop were observed for studying How long should not / shouldn't by using
五、阅读理解（共 35 分）
A 篇（判断正误）（每小题 1.5 分，共 7.5 分）
题号 36 37 38 39 40
答案 T F T F T
B 篇（选择）（每小题 1.5 分，共 7.5 分）
题号 41 42 43 44 45
答案 A B D C B
C 篇（选择）（每小题 1.5 分，共 7.5 分）
题号 46 47 48 49 50
答案 B A D C B
D 篇（七选五）（每小题 2 分，共 10 分）
题号 51 52 53 54 55
答案 B A D E C
多余选项：F
E 篇（回答问题）（每小题 1.5 分，共 7.5 分）
56. He discovered a new species of beetle.
57. He found it in his backyard (under a log).
58. Because they were confused by bright lights from nearby buildings.
59. He started a campaign to turn off lights near the beach during turtle nesting season.
60. Observe nature around you, keep notes, ask questions, and look for answers.
六、情景交际（每小题 1 分，共 5 分）
题号 61 62 63 64 65
答案 D B C F A
多余选项：E
七、句子翻译（每小题 2 分，共 10 分）
题号 答案
66 famous for
67 spent; observing / studying
68 idea
69 studying
70 Observing
八、书面表达（10 分）
参考范文：
Looking into Nature
Last summer, I spent a week observing ants in my garden. I watched how they worked together to carry food back to their nest.
From this experience, I learned two important things. First, teamwork makes difficult tasks possible. Second, even the smallest creatures have their own amazing world.
In the future, I want to keep observing nature and maybe become a biologist. I believe there is still so much to discover.

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