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译林版英语八年级上册Unit7 The Natural world单元培优测试卷
满分100分
一、完形填空（每题1.5分，共计15分）
阅读下面短文，掌握其大意，然后从A、B、C、D四个选项中选出一个最佳选项。
Nature is like a great magician (魔术师). It can make the world full of 1 and surprise. In spring, the trees turn green and flowers 2 everywhere. The sweet smell of the flowers makes people feel happy. When summer comes, the sun shines 3 and the weather becomes hot. Many people like to stay in the shade (树荫) of trees and enjoy the cool wind. Some even go to the beach to swim in the 4 sea water.
Autumn is a harvest (收获) season. The leaves on the trees turn yellow and begin to 5 down. Farmers are busy getting in their crops (庄稼). They have big smiles on their faces 6 they have a good harvest. Winter is cold and quiet. The whole world seems to be covered with 7 after a heavy snow. Children love this season because they can make snowmen and have snowball fights. They laugh and run around, 8 the cold weather.
Nature is our best friend. We should 9 it carefully. We can plant more trees, save water and reduce pollution. If we do so, nature will 10 us better and better.
A.beauty B. money C. noise D. danger
A.fall B. die C. grow D. come out
A.softly B. brightly C. slowly D. heavily
A.warm B. hot C. cool D. cold
A.put B. cut C. fall D. turn
A.if B. because C. so D. but
A.leaves B. grass C. ice D. snow
A.forgetting B. remembering C. enjoying D. hating
A.look for B. look after C. look at D. look up
A.teach B. help C. serve D. protect
二、阅读理解（本题有15小题，每小题2分，共计30分）
阅读下面四篇材料，然后从各题所给的A、B、C、D四个选项中选出一个最佳答案。
A
The natural world includes all living and non-living things around us. Living things like plants, animals and humans are part of it. Non-living things such as mountains, rivers, air and water are also important parts.
Plants are very important for the natural world. They can make their own food through photosynthesis (光合作用). During this process, they take in carbon dioxide and give out oxygen. This helps keep the air clean. Animals and humans can't live without oxygen. Many animals also eat plants to survive.
Rivers and lakes are home to many aquatic (水生的) animals and plants. Fish, frogs and turtles live in the water. Water plants provide food and shelter for them. Rivers also carry water to farms and cities. We use water for drinking, cooking and washing.
Mountains are another great part of the natural world. They have different kinds of plants and animals. Some mountains are covered with forests, while others are snowy all year round. Many people like to climb mountains for fun and exercise.
We must protect the natural world. Pollution and deforestation (森林砍伐) are hurting it. Let's do our best to keep it clean and beautiful.
( )1. What can plants do through photosynthesis
A. Take in oxygen. B. Make their own food.
C. Drink lots of water. D. Grow very fast.
( )2. Which of the following is a non-living thing in the natural world
A. Fish. B. Trees. C. Rivers. D. Birds.
( )3. Why are rivers important
A. They are only home to fish. B. They can stop pollution.
C. They provide water for us. D. They are good for climbing.
B
Forests are one of the most important parts of the natural world. They cover a large part of the Earth's land. Forests are home to thousands of plants and animals. From small insects to big tigers, many creatures live in forests.
Trees in forests are very useful. They provide wood for building houses and making furniture. They also help to keep the air clean. Trees take in harmful gases and produce oxygen. Forests can also stop soil erosion (水土流失). The roots of trees hold the soil together, so rainwater won't wash it away easily.
However, forests are in danger now. People cut down many trees every year. This is called deforestation. Deforestation makes many animals lose their homes. Some species are even in danger of dying out. It also causes climate change. Without enough trees, the Earth's temperature may rise.
We can do many things to protect forests. We can plant more trees. We can also use less paper to save trees. Let's work together to protect our forests.
( )4. What is NOT a use of trees in forests
A. Providing wood for building. B. Keeping the air clean.
C. Producing oxygen. D. Causing soil erosion.
( )5. What does deforestation mean
A. Planting more trees. B. Cutting down many trees.
C. Protecting animals. D. Saving paper.
( )6. How does deforestation affect animals
A. It gives them more food. B. It makes them lose their homes.
C. It helps them live better. D. It makes them stronger.
( )7. What can we do to protect forests
A. Cut down more trees. B. Use more paper.
C. Plant more trees. D. Waste wood.
C
Oceans are amazing parts of the natural world. They are the largest bodies of water on Earth. Oceans are full of life. There are more than 230,000 known species of sea creatures. From tiny plankton (浮游生物) to huge whales, all kinds of animals live in oceans.
Sea plants are also important. Seaweed and other plants provide food for many sea animals. They also produce a lot of oxygen. In fact, oceans produce more than half of the world's oxygen.
But oceans are facing many problems. Pollution is a big threat. People throw rubbish into oceans. Plastic bags, bottles and other waste can hurt or kill sea animals. Oil spills (石油泄漏) also pollute the water and harm sea life.
Overfishing is another problem. Some people catch too many fish. This makes the number of fish drop quickly. It also breaks the balance of the ocean ecosystem (生态系统).
We must protect oceans. We can stop throwing rubbish into water. We can also support laws against overfishing. Let's keep oceans clean and healthy.
( )8. How many known species of sea creatures are there
A. Less than 200,000. B. More than 230,000.
C. About 100,000. D. Over 300,000.
( )9. What do sea plants provide for sea animals
A. Food. B. Rubbish. C. Oil. D. Plastic.
( )10. What is NOT a problem facing oceans
A. Pollution. B. Overfishing. C. Oxygen production. D. Oil spills.
( )11. How can we protect oceans
A. Throw more rubbish into water. B. Support overfishing.
C. Stop using plastic. D. Follow laws against overfishing.
D
Deserts are unique parts of the natural world. They are dry areas with little rain. Most deserts get less than 25 centimeters of rain per year. But even in such harsh (恶劣的) conditions, many plants and animals have adapted (适应) to live there.
Cacti are famous desert plants. They have thick stems to store water. Their spines (刺) instead of leaves help reduce water loss. Other desert plants like sagebrush (山艾树) have deep roots to find water underground.
Desert animals also have special skills. Camels can store water and fat in their humps (驼峰). They can go for days without drinking water. Lizards (蜥蜴) and snakes are active at night when it's cooler. They hide in holes during the day to avoid the hot sun.
Some deserts are hot, like the Sahara Desert in Africa. Others are cold, like the Gobi Desert in Asia. Cold deserts have long, cold winters and short, cool summers.
Deserts are important for the natural world. They are home to unique species. We should protect deserts and the creatures that live there.
( )12. How much rain do most deserts get per year
A. Less than 25 cm. B. More than 50 cm.
C. About 30 cm. D. Over 40 cm.
( )13. What do cacti use to store water
A. Leaves. B. Spines. C. Thick stems. D. Roots.
( )14. Why are some desert animals active at night
A. Because it's hotter. B. Because it's cooler.
C. Because there's more food. D. Because there's more water.
( )15. Which desert is cold
A. The Sahara Desert. B. The Gobi Desert.
C. The Arabian Desert. D. The Australian Desert.
三、词汇运用（本题有15小题，每小题1分，共计15分）
A. 用方框中所给单词的适当形式填空，每词仅用一次。
We should ______ wild animals because they are our friends.
Plants can ______ oxygen through photosynthesis.
The ______ world is full of amazing plants and animals.
Some animals have special skills to ______ in deserts.
Many species are in ______ because of pollution.
B. 根据短文内容和所给提示，在空白处写出所给单词的正确形式.
The natural world is wonderful. There are many 1. ______ (不同的) kinds of plants and animals. Forests are important 2. ______ (栖息地) for many creatures. But people often cut down trees, which makes animals lose their homes.
Oceans are also part of the natural world. They 3. ______ (覆盖) most of the Earth. But ocean 4. ______ (污染) is a serious problem. Rubbish can 5. ______ (伤害) sea animals.
We must take 6. ______ (行动) to protect the natural world. We can plant more trees and 7. ______ (减少) pollution. We should also tell others about the 8. ______ (重要性) of protecting nature. If we work together, we can keep the natural world 9. ______ (健康的). Let's 10. ______ (珍惜) the natural world around us.
四、语法填空（本题有10小题；每小题1分，共计10分）
阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。
The natural world is full of surprises. I love 1. ______ (explore) it. Last weekend, I went to a forest with my friends. We 2. ______ (see) many beautiful birds and flowers there. The air 3. ______ (be) fresh and clean.
Plants in the forest 4. ______ (look) green and lively. Some vines (藤蔓) 5. ______ (climb) up the trees. We learned that plants can 6. ______ (make) food by themselves. Animals depend on plants for food and shelter.
On our way back, we 7. ______ (find) some rubbish. We picked it up because we wanted to keep the forest clean. It's our duty 8. ______ (protect) the natural world.
If we destroy the natural world, we 9. ______ (lose) many precious things. Let's do our best to make the natural world 10. ______ (beautiful) than before.
五、任务型阅读（共15分）
The natural world is made up of many parts, including forests, oceans, deserts and mountains. Each part has its own characteristics and creatures.
Forests are full of trees and plants. They are home to many animals like bears, monkeys and birds. Trees in forests help to clean the air and prevent soil erosion. Many people visit forests for hiking and camping.
Oceans are large bodies of salt water. They are home to countless sea animals and plants. Fish, whales, dolphins and coral reefs (珊瑚礁) all live in oceans. Oceans also play an important role in regulating the Earth's climate.
Deserts are dry areas with little rainfall. Despite the harsh conditions, some plants like cacti and animals like camels can survive there. Hot deserts are warm all year round, while cold deserts have cold winters.
Mountains are high landforms. They have different weather conditions at different heights. The top of a mountain is often cold and snowy, even in summer. Many rare plants and animals live in mountainous areas.
Protecting the natural world is crucial. We must stop pollution and deforestation to keep it healthy.
(1)、阅读以上短文，选择合适的答案（每题1分，共5分）
What is NOT part of the natural world
A. Forests. B. Oceans. C. Cities. D. Mountains.
What do trees in forests help to do
A. Pollute the air. B. Cause soil erosion.
C. Clean the air. D. Destroy animals' homes.
Which animal lives in deserts
A. Whales. B. Camels. C. Dolphins. D. Monkeys.
What is the weather like on the top of a mountain
A. Hot and dry. B. Cold and snowy.
C. Warm and rainy. D. Cool and windy.
Why is protecting the natural world crucial
A. Because it's not important for us. B. Because it provides homes for creatures.
C. Because it causes pollution. D. Because it destroys forests.
（2）、根据短文内容，完成下列句子或回答问题（每题2分，共10分）
6. Oceans are home to countless sea animals and ____________.
7. Deserts have little rainfall and harsh ____________.
8. What role do oceans play in regulating
What can we do to protect the natural world
We must stop pollution and ____________.
What is the natural world made up of
It is made up of forests, oceans, deserts, mountains and other ____________.
六、书面表达（计15分）
假设你是大明，你校英语俱乐部正在举办以 “Protect the Natural World” 为题的征文活动。请你根据以下提示写一篇短文，字数80左右。
提示：
自然界的重要性（提供氧气、栖息地等）；
自然界面临的问题（污染、森林砍伐等）；
我们可以做的保护措施（植树、减少污染等）；
呼吁大家保护自然界。
参考答案
完形填空.
1-5 ADBCC 6-10 BDABC
二、阅读理解.
1.B 2.C 3.C 4.D 5.B 6.B 7.C 8.B 9.A 10.C
11.D 12.A 13.C 14.B 15.B
三、词汇运用.
A. 1.protect 2.produce 3.natural 4.survive 5.danger
B. 1.different 2.habitats 3.cover 4.pollution 5.harm
6.action 7.reduce 8.importance 9.healthy 10.cherish
四、语法填空.
1.exploring 2.saw 3.was 4.look 5.climb 6.make 7.found
8.to protect 9.will lose 10.more beautiful
五、任务型阅读.
(1)单项选择 1.C 2.C 3.B 4.B 5.B
(2)任务型阅读 6.plants 7.conditions 8.The Earth's climate. 9.deforestation 10.parts
六、书面表达（参考范文）
Protect the Natural World
The natural world is very important. It provides us with clean air and habitats for animals. But it's facing many problems now, such as pollution and deforestation.
We can do something to help. We can plant more trees and reduce pollution by using less plastic. We should also stop cutting down trees.
The natural world is our home. Let's work together to protect it. Only in this way can we live a happy life with nature.
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