沪教版七年级下册第3单元测试卷（A卷）
七年级下 Unit 3 Trees and Us 测试卷
（A卷）
学校：__________班级：__________姓名：_________考号：___________
第Ⅰ卷 选择题
一、语法选择 （10分）
Trees play a vital role in our lives. They 1 us oxygen, clean the air, and provide homes for animals. However, humans 2 down forests for years. Now, many people 3 to protect trees.
For example, my friend Li Ming 4 a project about tree conservation. He 5 posters to tell people why trees are important. Right now, he 6 a speech about reusing paper. “If everyone 7 less paper, we can save more trees,” he says.
I 8 his ideas. My family 9 to plant ten trees every year. This year, we 10 already planted five.
1. A. provide B. provides C. provided D. providing
2. A. cut B. are cutting C. have cut D. cuts
3. A. try B. tried C. are trying D. tries
4. A. starts B. started C. is starting D. has started
5. A. designs B. designed C. is designing D. will design
6. A. prepares B. prepared C. is preparing D. has prepared
7. A. uses B. use C. used D. will use
8. A. support B. supports C. supported D. am supporting
9. A. promises B. promised C. have promised D. are promising
10. A. has B. have C. had D. are having
二、完形填空（每题1.5分，共15分）
Trees are called the “lungs of the Earth” because they take in carbon dioxide and 1 oxygen. However, deforestation (砍伐森林) has become a serious problem. Every year, millions of trees 2 cut down. This not only harms the environment but also destroys the homes of many animals.
In 2020, a group of students from Green School decided to take action. They 3 a campaign called “Save Our Trees”. They organized tree-planting activities and taught villagers 4 to protect forests. At first, some people didn’t listen, but the students didn’t give up. They 5 posters and gave speeches in the community.
One day, a farmer named Mr. Wang 6 to the students. He said, “I used to cut down trees for wood, but now I realize how important they are. I 7 to plant 100 trees this year.” His words encouraged more people to join the campaign.
Now, the village looks greener than before. The students’ efforts 8 a big difference. Their story teaches us that even small actions can 9 the world. As the saying goes, “The best time to plant a tree was 20 years ago. The second-best time is 10 .”
1. A. produce B. absorb C. reduce D. pollute
2. A. is B. are C. was D. were
3. A. launch B. launched C. are launching D. will launch
4. A. what B. when C. how D. why
5. A. make B. made C. are making D. will make
6. A. talks B. talked C. is talking D. has talked
7. A. plan B. planned C. have planned D. am planning
8. A. make B. makes C. made D. have made
9. A. change B. changes C. changed D. changing
10. A. yesterday B. today C. tomorrow D. future
三、阅读理解（共4篇，每题2分，共40分）
A
The Talking Trees
Did you know trees can “talk” to each other Scientists have discovered that trees communicate through underground networks made by fungi (真菌). These networks are called the “Wood Wide Web”.
When a tree is attacked by insects, it sends chemical signals through the fungi to warn nearby trees. The neighboring trees then produce bitter-tasting chemicals to protect themselves. Some trees even share nutrients with sick or young trees through these networks.
This amazing discovery shows that trees are not just silent beings—they care for each other like a family.
1.How do trees communicate with each other
A. Through their branches. B. Through underground fungi networks.
C. By dropping leaves. D. By making sounds.
2.What do trees do when they receive a warning signal
A. They grow taller. B. They produce bitter chemicals.
C. They attract more insects. D. They stop absorbing water.
3.What does the “Wood Wide Web” help trees do
A. Compete for sunlight. B. Share nutrients and warnings.
C. Grow faster in spring. D. Store more carbon dioxide.
4.The word “silent” in the last paragraph means ______.
A. noisy B. quiet C. active D. dangerous
5.What is the main idea of the passage
A. Trees can protect themselves from insects.
B. Trees have a secret way of communicating.
C. Fungi are harmful to trees.
D. Trees need human help to survive.
B
The Oldest Tree in the World
Methuselah, a bristlecone pine tree in California, is over 4,800 years old. It is the oldest known non-clonal tree (非克隆树) on Earth.
Bristlecone pines grow slowly in harsh conditions—cold weather, strong winds, and poor soil. These tough conditions help them live longer. Their wood is very dense, which makes it hard for insects and diseases to attack them.
Scientists study Methuselah to learn about climate changes over thousands of years. By examining its rings, they can tell what the weather was like each year.
1.How old is Methuselah
A. 1,000 years. B. 2,200 years. C. 4,800 years. D. 10,000 years.
2.Why do bristlecone pines live so long
A. They grow in perfect weather. B. Their wood is dense and strong.
C. They are cloned trees. D. They have no natural enemies.
3.What can scientists learn from tree rings
A. The tree’s height. B. Historical climate data.
C. The number of insects. D. Soil types.
4.The word “harsh” in Paragraph 2 means ______.
A. comfortable B. modern C. extremely tough D. colorful
5.What is the purpose of this passage
A. To encourage people to visit California.
B. To explain how trees record climate history.
C. To describe the life of a famous scientist.
D. To advertise a new type of pine tree.
C
The Boy Who Planted a Forest
In 1979, a 16-year-old Indian boy named Jadav Payeng noticed that many snakes died on a dry riverbank. He decided to plant trees to create a habitat for wildlife.
Over the next 40 years, Jadav planted thousands of trees by himself. Today, his forest covers 1,360 acres—larger than Central Park! The forest is home to tigers, elephants, and hundreds of birds.
Jadav’s story shows that one person’s effort can make a huge difference. He once said, “If you plant a tree, you plant hope for the future.”
1.Why did Jadav start planting trees
A. To earn money. B. To save dying snakes.
C. To build a park. D. To study animals.
2.How long did it take Jadav to create the forest
A. 10 years. B. 20 years. C. 30 years. D. 40 years.
3.What animals live in Jadav’s forest
A. Tigers and elephants. B. Lions and zebras.
C. Penguins and polar bears. D. Kangaroos and koalas.
4.What does Jadav’s story teach us
A. Forests are easy to grow. B. One person can change the world.
C. Snakes are dangerous. D. Wildlife needs no protection.
5.The phrase “plant hope for the future” means ______.
A. create opportunities for success
B. grow crops for food
C. build houses for people
D. protect the environment for later generations
D
How to Plant a Tree
Planting a tree is a simple way to help the environment. Follow these steps:
1.Choose the right tree: Pick a species that suits your local climate.
2.Dig a hole: Make it twice as wide as the root ball but not deeper.
3.Place the tree: Put the tree in the hole and fill it with soil.
4.Water it: Give the tree enough water to help its roots grow.
5.Add mulch: Cover the soil with leaves or wood chips to keep it moist.
Trees need care in their first few years. Water them regularly and protect them from pests.
1.What is the first step in planting a tree
A. Dig a deep hole. B. Choose a suitable species.
C. Water the soil. D. Add mulch.
2.Why should the hole be twice as wide as the root ball
A. To save space. B. To help roots spread.
C. To attract worms. D. To prevent flooding.
3.What is the purpose of adding mulch
A. To decorate the tree. B. To keep the soil moist.
C. To feed the tree. D. To scare animals away.
4.How long do trees need special care
A. For one week. B. For a month.
C. For the first few years. D. Forever.
5.What is the main idea of the passage
A. Trees improve air quality.
B. Planting trees requires careful steps.
C. All trees grow quickly.
D. Mulch is harmful to trees.
第Ⅱ卷 非选择题（共35分）
第一节、根据首字母填写单词（每题1分，共6分）
1.Trees p______ oxygen, which is essential for humans.
2.We should r______ paper to save more trees.
3.The teacher e______ why trees are important in today’s class.
4.The roots of a tree a______ water and nutrients from the soil.
5.Many animals lose their h______ because of deforestation.
6.Planting trees is a s______ way to fight climate change.
第二节、完成句子（每题2分，共14分）
1.树木吸收二氧化碳并释放氧气。
Trees ______ carbon dioxide and ______ oxygen.
2.我们应该停止砍伐森林来保护环境。
We should ______ forests to protect the environment.
3.现在进行时用于描述正在发生的动作。
The present continuous is used ______.
4.李华正在为植树活动准备工具。
Li Hua ______ tools for the tree-planting activity.
5.如果我们不保护树木，地球将面临更多问题。
If we don’t protect trees, the Earth ______.
6.这张桌子是用木头制成的。
This desk ______ wood.
7.学生们在讨论如何减少纸张浪费。
The students are discussing ______ paper waste.
第三节、书面表达（15分）
假设你是学校环保俱乐部成员，请写一篇倡议书，呼吁同学们参与植树活动。内容包括：
1.树木的重要性（提供氧气、净化空气、保护动物家园等）；
2.当前树木面临的问题（过度砍伐、污染等）；
3.呼吁大家参与植树并节约用纸。
要求：
80词左右；
使用本单元所学词汇和句型，如 provide, protect, take action, reuse paper 等。
答案
第Ⅰ卷 选择题
一、语法选择
1.B 2. C 3. C 4. D 5. C 6. C 7. B 8. A 9. C 10. B
二、完形填空
1.A 2. B 3. B 4. C 5. B 6. B 7. C 8. D 9. A 10. B
三、阅读理解
A: 1-5 BBBBB B: 6-10 CBBCC C: 11-15 BDABD D: 16-20 BBBCB
第Ⅱ卷 非选择题
第一节、根据首字母填写单词
1.produce 2. reuse 3. explained 4. absorb 5. habitats 6. simple
第二节、完成句子
1.take in; release/produce
2.stop cutting down
3.to describe actions happening now
4.is preparing
5.will face more problems
6.is made of
7.how to reduce
第三节、书面表达（参考范文）
Let’s Plant Trees Together!
Dear classmates,
Trees are vital to our lives. They provide us with oxygen, clean the air, and offer homes to animals. However, forests are disappearing because of over-cutting and pollution. We must take action now!
Join our tree-planting activity this Saturday. Let’s dig holes, plant saplings, and water them together. Also, remember to reuse paper and avoid wasting it. Every small effort counts!
Together, we can make the Earth greener!
Eco Club
