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沪教版七年级英语上册Unit 4 The Earth语法精练
（Using there is / are...等知识点）
一、词汇运用（结合语境考查词形变化及拼写）
1. Our solar ________ (system) has eight planets, including Earth.
2. The teacher asked us to make a fact ________ (file) about the Earth's ecosystems.
3. The ________ (amazing) thing about the Earth is that it has life.
4. Earth is the only ________ (planet) in the solar system with liquid water.
5. The Earth is about four and a half ________ (billion) years old.
6. More than 70% of the Earth's surface is ________ (cover) by water.
7. The ________ (freezing) temperatures at the North Pole make it hard to live there.
8. The Sahara is the largest hot ________ (desert) in the world.
9. This river is about 500 ________ (metre) wide at its mouth.
10. The ocean can ________ (provide) us with many kinds of food.
11. Scientists want to ________ (explore) the deep sea to find new species.
12. Too much ________ (plastic) in the ocean is harmful to sea life.
13. We must ________ (protect) our groundwater from pollution.
14. Burning ________ (oil) and gas produces harmful gases.
15. There are many ________ (website) about how to save the Earth.
二、句型转换（考查there be句型及本单元核心句型）
1. There is a large desert in Africa.（改为复数句）
________ ________ large ________ in Africa.
2. The Earth has seven continents.（用there be句型改写）
________ ________ seven continents ________ the Earth.
3. We should protect wild animals.（改为否定句）
We ________ ________ wild animals.
4. Plastic pollution harms the ocean.（改为同义句）
Plastic pollution ________ ________ ________ the ocean.
5. There are hundreds of whales in this area.（对划线部分提问）
________ ________ whales ________ ________ in this area
6. The North Pole is covered by ice.（改为一般疑问句）
________ the North Pole ________ by ice
7. Humans need clean water to live.（用there be句型补充句子）
________ ________ no clean water, humans can't live.
8. The desert reaches temperatures of 50°C.（对划线部分提问）
________ ________ ________ the desert reach
9. There is some groundwater under the soil.（改为否定句）
________ ________ ________ groundwater under the soil.
10. Factories produce harmful gases.（改为被动语态）
Harmful gases ________ ________ ________ factories.
11. We can explore the ocean with special ships.（对划线部分提问）
________ ________ we explore the ocean
12. There are many butterflies in the rainforest.（改为一般现在时的单数句）
________ ________ a ________ in the rainforest.
13. Cutting down trees causes sandstorms.（改为同义句）
Cutting down trees ________ ________ sandstorms.
14. The Earth provides us with air and water.（用there be句型改写）
________ ________ air and water ________ the Earth provides us.
15. Polar bears live at the North Pole.（对划线部分提问）
________ ________ polar bears live
三、阅读理解（在语篇中考查对there be句型及本单元词汇的理解）
A篇：The Earth's Ecosystems
The Earth is an amazing planet. There are many different ecosystems on it, each with its own plants and animals.
There are freezing lands at the North and South Poles. Only a few animals, like polar bears and penguins, can live there. Deserts are hot and dry, but there are still creatures that call them home, such as snakes and camels.
Forests cover about 30% of the Earth's land. There are hundreds of kinds of trees, birds, and insects in them. Oceans are the largest ecosystems — they cover more than two-thirds of the planet. There are whales, fish, and even tiny creatures in the ocean depths.
All these ecosystems are connected. We must protect them to keep the Earth healthy.
1. What is special about the Earth according to the passage
A. It has deserts B. It has many ecosystems C. It is very cold D. It has no water
2. Which animals live at the North Pole
A. Penguins B. Camels C. Polar bears D. Snakes
3. How much of the Earth's land is covered by forests
A. 30% B. 50% C. 70% D. 90%
4. What covers more than two-thirds of the Earth
A. Deserts B. Forests C. Oceans D. Polar lands
5. Why must we protect ecosystems
A. To keep the Earth healthy B. To make deserts larger
C. To freeze the poles D. To cut down trees
B篇：Protecting Our Planet
Our Earth faces many problems. There is too much plastic pollution in the oceans — fish and whales often get hurt by it. What's more, burning oil and gas produces harmful gases that make the air dirty.
Cutting down forests is another problem. Without trees, sandstorms blow away the soil, and many animals lose their homes. Groundwater is getting polluted too, which is bad for both people and plants.
But there are solutions. We can use less plastic, plant more trees, and save water. Everyone can help protect the Earth. After all, it's our only home.
6. What hurts fish and whales in the oceans
A. Sandstorms B. Plastic pollution C. Harmful gases D. Groundwater
7. What do burning oil and gas produce
A. Clean air B. Plastic C. Harmful gases D. Water
8. Why is cutting down forests a problem
A. It causes sandstorms B. It makes the ocean dirty
C. It produces oil D. It freezes the poles
9. What can we do to protect the Earth
A. Use more plastic B. Cut down trees C. Save water D. Burn more gas
10. What is the main idea of the passage
A. The Earth's deserts B. Problems on Earth and solutions
C. Ecosystems at the poles D. How to explore the ocean
四、书面表达（综合运用本单元词汇及句型）
以"Our Amazing Earth"为题，写一篇短文介绍地球的特点及保护地球的方法，至少使用5处本单元核心词汇（如planet, pollution, protect等）和3个there be句型。
要求：1. 语言准确，语意连贯；2. 词数100-150词。
答案
一、词汇运用
1. system 2. file 3. amazing 4. planet 5. billion 6. covered 7. freezing
8. desert 9. metres 10. provide 11. explore 12. plastic 13. protect
14. oil 15. websites
二、句型转换
1. There are; deserts 2. There are; on 3. shouldn't protect 4. is harmful to
5. How many; are there 6. Is; covered 7. If there is 8. What temperature does 9. There isn't any 10. are produced by 11. How can 12. There is; butterfly
13. leads to 14. There is; that 15. Where do
三、阅读理解
A篇：1. B 2. C 3. A 4. C 5. A
B篇：6. B 7. C 8. A 9. C 10. B
四、书面表达（参考范文）
Our Amazing Earth
Earth is an amazing planet. There is water and air, which make life possible. There are seven continents and five oceans covering most of its surface. It's home to millions of plants and animals.
But our planet faces problems. There is too much plastic pollution in the oceans, and harmful gases from burning oil harm the air. We must protect it. We can use less plastic, plant more trees, and save water.
The Earth is our only home. Let's work together to keep it healthy for future generations.

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