Forests are the lungs of the earth. Without t...

Forests are the lungs of the earth. Without them, it cannot breathe. It needs its forests to remove carbon dioxide from the air and to make oxygen. In many countries, such as New Zealand, Canada, and Brazil, forests were cut down to1. (提供)wood to build houses. Cutting down trees is h2. to human beings,animals and plants. Many young volunteers around the world are working in their holidays to plant new trees to replace them.

These young men and women f3. many difficulties when they plant new trees. The weather may be very hot and dry or may be very cold and wet. Tree 4.(种植者) are changing the world. They plant different types of trees so that birds and animals can live in the forests. They b5.that in 50 years their little trees will become beautiful forests.

九年级英语单词填空中等难度题查看答案及解析

When you think of the Arctic (北极), you imagine an icy land of pure white snow. Others imagine it as the last really clean place left on earth. We have polluted the deepest oceans with plastic rubbish. “And now”, CNN says, “It’s the Arctic’s turn.”

German scientists have recently found microplastics in Arctic snow. Microplastics are pieces of plastic smaller than 5 millimeters. Sadly, the scientists found 1800 pieces of microplastics per liter of (每升) snow.

How is plastic pollution reaching the Arctic? According to scientists, “It’s clear that most of the microplastics in the snow come from the air.” They fall off the plastic objects and are moved by the wind, just like dust. They mix with ice in the air and fall to the ground as snow. Finding these plastics in Arctic snow means that we may breathe them in.

Are they bad for us? Scientists cannot answer this question for now, according to the WHO. We do know that our bodies cannot take in “large” pieces of microplastics. However, if the plastics are small enough, they can find ways into our bodies and stay there for a long time, which can be bad for our health. What’s more, earlier studies have shown that microplastics may contribute to lung cancer risk.

Microplastics have also been found in rivers and oceans around the world. Earlier research has found that they flow over long distances and into our oceans, hurting ecosystems along the way. They start in our wastewater, then flow into rivers and out to the sea, where they are eaten by sea animals. If people then eat these animals, it means that we’re eating the plastic as well.

1.We can learn from Paragraph 1 that________.

A.the Arctic is the last really clean place left on earth

B.the Arctic is an icy land of pure white snow

C.the Arctic is a beautiful icy land with clean air

D. the Arctic has been polluted by plastic rubbish

2.The underlined word “contribute” means “_______” in Chinese.

A.增加 B.捐献 C.造成 D.是……原因之一

3.Where do most of the microplastics in the snow come from?

A.From water. B.From air. C.From wind. D.From food.

4.Which of the following isn’t true?

A.We may breathe microplastics in Arctic.

B.Microplastics may cause lung cancer.

C.We don’t have to mind microplastics right now.

D. Microplastics have hurt ecosystems.

5.How does the writer end this passage?

A.By advising us to drink clean water.

B.By asking people not to eat sea animals.

C.By telling the seriousness of plastic pollution.

D.By showing the beauty of Arctic.

九年级英语阅读单选困难题查看答案及解析

The rockets take astronauts and man-made satellites(卫星)into space. The satellites are used for communication, weather checking and research. But how do satellites stay up without falling down?

There are two opposite forces influencing the satellite. One of them is the force of gravitation(地心引力), which tries to pull the satellite towards the earth and is like a rope which keeps the satellite from flying away. The other force is created by the turning of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round.

Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the force pulling it towards the earth stronger than the force pulling it away. This makes the satellite fall down to the earth.

1.Two same forces have an influence on the satellite.

2.The force created by the turning keeps the satellite from flying away.

3.Two opposite forces make the satellite turn round and round.

4.The satellite will stay in space forever.

九年级英语阅读判断中等难度题查看答案及解析

You Are What You Eat

Genetic (基因的) engineering is the scientific change of the genetic material in a living thing. It allows scientists to identify specific genes, to remove them from a living thing’s chromosomes(染色体), improve them, analyze them, and possibly clone them, and to then reinsert the changed gene into the original living thing, or a completely different living things. Unlike traditional breeding (繁殖), where a desired quality would be bred within the same kind of living things, genetic engineering can insert desired ones into living things of different kinds. Wow ... did you catch that?

Genetic engineering creates many positive contributions to agriculture. For example, by genetically engineered (GE) foods, anti-cancer agents, minerals and vitamins can be increased. Improved taste, shelf life, and better transport are all possible. Also, GE plants can increase pest and bacterial resistance（抵抗力）, therefore, making the food safe for the consumers.

But some argue that the possible negative effects outweigh the positives, and critics are starting to voice their worries. Unlike Europe, in the United States labeling（贴标签）is not required on genetically engineered foods or on foods that contain genetically engineered products. Most Americans do not realize that they are, in fact, eating GE foods.

The public is also concerned about the unknown health risks. With limited understanding of genes, scientists cannot predict possible effects. Because most genes introduced into GE plants come from sources not introduced into the human body, it is impossible to know if they will cause reactions. Moreover, due to the lack of labeling, if allergies（过敏）develop, it will be extremely difficult to find the origin of them.

There is also a major moral question in many minds. For many, the conflict is not if it is safe or not, but it disturbs them because it is unnatural and unnecessary. We are currently producing one and a half times the amount of food needed to feed the world, yet one in seven people are starving. So GE food is unnecessary, and fails to address the root of hunger. Many believe that the only people who will benefit are the corporations that produce it.　

Scientists cannot foresee the possible effects of GE foods, yet we eat them every day without even knowing it. We already have enough food, so why create more that could be potentially harmful to us, to the Earth and to all wildlife? I think that the benefits are amazing, but until we know for sure how these foods will affect us, they are not worth the risk.

1.According to the passage, traditional breeding is different from genetic engineering because________.

A.traditional breeding changes the genes in the same kind of living things

B.traditional breeding takes place within the same kind of living things

C.traditional breeding is more scientific

D.traditional breeding changes the genes in different kinds of living things

2.According to Paragraph 5, GE food is unnecessary because ________.

A.customers will benefit from GE food

B.we’re now producing more food than before

C.it won’t help solve the problem of hunger in the world

D.there are obvious dangers in producing GE food

3.What is the writer’s writing purpose?

A.To introduce genetic engineering’s positive contributions to agriculture.

B.To welcome genetic engineering and GE food.

C.To discuss the differences between GE food and other food.

D.To tell people to keep GE food off before their influence on us is clear.

九年级英语阅读单选困难题查看答案及解析

阅读短文，根据语篇要求填空，使短文通顺、意思完整。每空限填一词。

Although the world is hungry, it is even thirstier. While nearly 3/4 of the earth is covered with water, we are short of drinking water. Actually about 97% of the water on the earth 1. sea water.

2. can we deal with the problem of lacking drinking water? Firstly, we should save water instead of wasting it. Second, we 3. protect our water resources and not pollute them. Lastly, we should discover ways to reuse water. Scientists 4. got some achievements in this field. But people's need for water is increasing day by day. We still don't have enough water.

The sea seems to have the best answer.There is plenty 5. water in the sea. But we need to take the salt away from the sea water. This is very expensive. Many scientists can find cheaper ways to do it. Without doubt, we will solve the problem gradually.

九年级英语语法填空困难题查看答案及解析

Record fires sweeping across the Amazon this month have been catching the world's attention, because scientists and environmental groups are worried that they will make the climate worse and threaten biodiversity.

As the largest rainforest in the world, the Amazon is often called "the lungs of the world". It is also home to about 3 million plants and animals, and 1 million native people. Rainforests play an important role in the world's ecosystem because they can take in heat. They can also store carbon dioxide and produce oxygen, making that less carbon is given off, mitigating the effects of climate change.

"Any forest destroyed is a threat to biodiversity and the people who use that biodiversity," said Thomas Lovejoy. "The most serious threat is that a lot of carbon goes into the air," he added. "In the center of the global climate crisis, we cannot afford more damage to a major source of oxygen and biodiversity. The Amazon must be protected," Antonio said.

Data from the National Institute for Space Research (INPE) show that the number of forest fires in Brazil quickly increased by 82 percent from January to August this year from a year ago. "The forest areas in the Brazilian Amazon have dropped between 20 and 30 percent compared to the last 12 months," Carlos Nobre said.

Word Bank

threaten　　 威胁　　 biodiversity　　 生物多样性　　 ecosystem　　 生态系统　　 crisis　　 危机　　 data　　 数据

1.What does the underlined word "they" refer to in Paragraph 1?

A.fires B.scientists

C.environmental groups D.rainforests

2.Which of the following words has the closest meaning with the underlined word "mitigating" in Paragraph 2?

A.reducing B.increasing

C.causing D.producing

3.What can we know from Paragraph 3?

A.The dry weather leads to the rainforest fires.

B.Carbon dioxide is important in the air.

C.Oxygen has nothing to do with global climate crisis.

D.Forests play an important role in biodiversity.

4.Which of the following statement is true according to the passage?

A.3 million plants, animals and people live in Amazon.

B.Rainforests can store carbon dioxide and produce oxygen.

C.Carbon dioxide goes into the air will do no harm to us.

D.Ecosystem can take in heat and give off carbon dioxide.

5.What's the best title of the passage?

A.The climate change crisis. B.The forest areas are decreasing.

C."The lungs of the earth" is burning. D.The world's ecosystem is under attack.

九年级英语阅读单选中等难度题查看答案及解析

Even if you are a good high jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity. You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.

Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around.

Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape the earth's gravity and carry you into space.

1.If you are a good high jumper, you can jump far higher than seven feet high.

2.You can know how much gravity is pulling you by weighing yourself.

3.Because of gravity, the water runs up hill and the balls back if you throw it into the air.

4.We can escape the earth's gravity by spaceship because it can travel very fast.

5.The Chinese meaning of "gravity" is "重力".

九年级英语阅读判断简单题查看答案及解析

My mother is cool — much cooler than most people. I give her full credit for making me the person who I am today. To thank her, I'd like to share some of the things she taught me.

1. 1.

No matter how hard things got, my mom could always joke about them. It has taught me things are never, ever, end-of-the-world kind of bad. I'm sure this has made me a more relaxed person.

2. 2.

My mother made her own clothes she felt like wearing. Soon enough, people asked her to make clothes, and it turned into a full-time business. That shows me how you can set up your own business by expressing yourself truthfully.

3. 3.

As a creative, my mother always encouraged us to do imaginative things for enjoyment and discouraged TV. We dressed up in costumes, drew pictures, and sang at the top of our lungs. Today, I am a very fun person to be with.

4. 4.

My mom has always pushed me towards becoming independent. Not for her good, but for mine. I made my own decisions without her trying to manage me. Because of this, I grow up to be completely independent.

5. 5.

Growing up, I've made my fair share of mistakes. Instead of saying "I told you so", my mom always let me work things out myself. She was also there to help me pick up the pieces, if I ever needed help.

For all that you've done and everything that you are—thank you, mom!

Word Bank：

credit　　 功劳

costume　　 戏服

lung　　　　　 肺

A.Imagination has no end.

B.Independence is important.

C.Self-expression leads to self-achievement.

D.Mistakes are OK as long as you learn from them.

E.Being hopeful is the key to turning things around.

九年级英语补全短文5选5中等难度题查看答案及解析

Want to save the earth? Plant a tree!

What's causing global (全球的) warming? Is it man-made? Or are temperatures simply changing naturally? Whatever the case, we can at least try to slow things down. But how?

The Wilderness Project has an idea. 1.. If the earth has more trees, greenhouse gases will be reduced, and this will help stop global warming.2. and improve air quality (质量).

3.. In Belgium, the Organization for Forests worked with farmers to help them plant more trees. In Spain, the Canopy Project plants one tree for every Spaniard (西班牙人) in order to improve the environment. In Germany, a teenager named Felix Finkbeiner has been leading a global movement to plant more trees.4..

Now, lots of people all over the world have already been planting more trees. In fact, if everyone plants one tree, just one, it will do great good to our environment.

So what can you do to help?5., although you need to get advice on how to look after it. Or you can join a tree planting project such as the ones mentioned above to help save the earth.

So, go on, plant a tree…and save the earth!

A.Maybe you can buy a young tree to grow

B.They suggest that we should plant more trees

C.Another question is how quickly the sea level will rise

D.Many countries are calling on people to plant more trees

E.What's more, they improve human health by producing oxygen (氧气)

F.He was nine when he came up with the idea of planting trees around the world

九年级英语补全短文6选5困难题查看答案及解析

Nearly everyone in the world eats some of it every day. In fact, you cannot live without it. It's usually white and it has a strong _________ . Every cell(细胞)in your body has it .Tears and sweat(眼泪和汗水)have it, too. What's it? As you may have _________, it's salt.

_________ the beginning of time, salt has been an important part of people's lives. It was once used by the Romans to pay their soldiers. In parts of Africa, it was used instead of money to _________ things.The oceans are filled with it. You can get it from the _________ as well. Pour it on food, and you can stop the food from going _________

Today, salt is used to make thousands of products. Sometimes it's _________ used to make clothes.

In cold places that are covered with snow and ice in winter, people_________ salt on the roads to melt(使融化)the ice. Driving would be much more dangerous if not for salt.

Many _________in English are connected to salt. For example, it's said that a person is "worth his salt”. That________ the person works very hard and is important. Remember that the Roman soldiers were paid in salt? This is probably where the expression comes from.

1.A.smell B.taste C.voice D.feeling

2.A.decided B.planned C.guessed D.mentioned

3.A.Since B.At C.For D.With

4.A.sell out B.pay for C.care about D.spend on

5.A.water B.rock C.forest D.earth

6.A.nice B.delicious C.awful D.salty

7.A.still B.even C.again D.just

8.A.mix B.serve C.heat D.spread

9.A.signs B.communities C.expressions D.stories

10.A.means B.warns C.seems D.suggests

九年级英语完型填空困难题查看答案及解析