We have only one earth. It is the only enviro...

We have only one earth. It is the only environment for humans, animals and plants to live or grow in. However, we are polluting our earth every day. Good news is that the whole world has realized the serious problems and has taken action to fight against it.

World No Tobacco Day (May 31)

The first World No Tobacco Day is April 7, 1988. Since 1989, it was changed to be May 31st every year. The purpose of the World No Tobacco Day is to encourage people not to smoke.

World Water Day (March 22, 1993)

United Nations named 22 March as the first World Water Day in 1993. It’s a day to celebrate water. It’s a day to prepare for how we manage water in the future. It is celebrated around the world every year.

Earth Hour (2007)

Earth Hour started for the first time on March 31, 2007 in Sydney, Australia. Since then, the last Saturday of every March was named as Earth hour day that year. On March 19, 2016, more than 350 famous buildings in 178 countries around the world turned off the lights for one hour to remind people to save electrical power.

Actions in China to save our environment

Smoking is not allowed in all indoor public places from 2014. This is the first time for China to care about personal health in public places.

Ban(禁令) on free plastic bags. Since June 1, 2008, free plastic shopping bags are not allowed to provide in all supermarkets, shopping malls, and other places. It is to encourage people to use cloth bags or baskets for their shopping things.

八年级英语填空困难题查看答案及解析

For thousands of years, humans have explored(探索) the Earth. Nowadays, we are exploring space. Astronomers (天文学家) are modern-day explorers. Now, many astronomers are looking for new planets and new places of humans to live in the future. But where do astronomers start looking?

First of all, astronomers look for a star. That’s because our own Earth moves around a star (the Sun). More importantly, it is the correct distance(距离) from the Sun for heat and light. So when astronomers have found the star, they look at the planets around it. In recent years, astronomers have found nearly 400 new planets with stars. However, many of these planets are either too near to the star or too far away.

However, if the planet is in a good position, astronomers look for three key things: water, air and rock. Water is important because all life needs water. Humans can drink it and they can also grow plants with water. And plants produce air for humans to breathe and food to eat. Rock on a planet is also important. That’s because there is often water under the rock.

After many years of scrutinizing, astronomers have found a planet that is similar to the Earth. It’s Gliese 581g and it’s near a star. The astronomers think it has water and rock and the average(平均的) temperature is between-310C and -120C. That’s cold，but not colder than Antarctica or Arctic Circle, for example, Gliese 581g is bigger than the Earth. A year on Gliese 581g is only 37 Earth days instead of 365. But astronomers do not think there are big differences and some them thing Gliese 581g will be a new Earth. However, Gliese 581g is twenty light years from the Earth.

1.What do astronomers have to find first before starting to look for a new place for humans to have?

A. A new star. B. A new planet. C. Some heat. D. Some light.

2.What does the rock on a planet tell us?

A. The star is a right position.

B. We may discover water under it.

C. The planet is too near to the Sun.

D. There can be air around the rock.

3.What does the underlined word “scrutinizing” mean in the last paragraph?

A. discussing B. waiting C. looking D. traveling

4.What’s the main idea of the text?

A. Gliese 581g is already a new Earth.

B. There are planets similar to our Earth.

C. Water, air and rock are important.

D. Astronomers are looking for a new Earth.

八年级英语阅读单选中等难度题查看答案及解析

We have only one earth. We should ____ and take actions to protect it.

A. stop to pollute　　　　　　　　　　 B. stop polluting

C. to stop to pollute　　　　　　　　 D. to stop polluting

八年级英语单项填空简单题查看答案及解析

The sun is always shining. But it can only shine on one side of the earth at one time.When the sun is shining on one side of the earth, it is night on the other side.

At night, you can see the stars. The stars are in the sky all day. But the light from the sun is so bright that you can't see them. When night comes, there is no light, and the stars are bright enough to see. The stars look very small. But some of them are even bigger than the sun. They look small because they are so far away from you. Big things look much smaller when they are far away. The sun is closer to the earth than other stars, so it looks bigger.

1.When it is night, the sun ________.

A. doesn't shine

B. shines for a short time

C. disappears (消失)

D. shines on the other side of the earth

2.We can't see the stars in the sky at daytime because ________.

A. there are no stars there

B. the stars are much smaller than the sun

C. the bright light from the sun makes them not seen

D. the stars come out only at night

3.The stars look small because ________.

A. they are far away

B. they are small

C. they have no light

D. they are in the sky

4.Small things may look ________ when they are close.

A. bigger　　 B. small

C. near　　 D. far away

5.The sun looks bigger than other stars because ________.

A. it's bigger

B. it's far away in the sky

C. It gives much bright light

D. it's closer to the earth than other stars

八年级英语阅读理解困难题查看答案及解析

It is said that we will have _____ one-day holiday tomorrow, it’s ______ good news for most of the students.

A. an; a　　　　　　 B. an; a

C. a; /　　　　　　　 D. a; the

八年级英语单项填空中等难度题查看答案及解析

It is said that we will have _____ one-day holiday tomorrow, it’s ______ good news for most of the students.

A. an; a　　　　　　     B. an; a　　　　　　　     C. a; /　　　　　　     D. a; the

八年级英语单项填空中等难度题查看答案及解析

—If we don’t protect the environment, plants and animals will die out on Earth one day.

—So everyone should try his best to do something for the environment.

A.appear B.disappear C.happen

八年级英语单选题简单题查看答案及解析

As we all know, the Moon is the moon (卫星) of Earth, and it goes around the earth.Scientists have already known a lot about it, (A) but they’ve always wanted

to know more about it.And they decided to send men to the Moon.They think it’s the best way to learn more about the moon.

But how do the astronauts (宇航员) get to the moon? The moon is about 384,000 kilometers away from the earth.They can’t take a plane to the Moon.But something can fly even when there is no air.That is a manned spacecraft(载人宇宙飞船).Several astronauts have been to the Moon in the manned spacecraft.

1.“it” in sentence (A) refers to (指得是) _____.

A.the planets　　　　　　　 　　　　　 B.the Moon　　

C.the sky　　　　　　　　　　 　　　　 D.the star

2.The Moon is _____ away from the earth.

A.over 384,000 kilometers　　　　 B.only 384,000 kilometers

C.about 384,000 kilometers　 　　 D.about 348,000 kilometers far

3.The best way to learn more about the Moon is to _____.

A.send men there　　　　 　　　　　　 B.take photos of it　　

C.live on it　　　　　　　　 　　　　 D.find another moon

4.The astronauts have been to the moon in the _____.

A.plane　　　　　　　　　　 　　　　 B.manned spacecraft　

C.space station　　　　　　 　　　　　 D.air

5.The best title (题目) for this passage is _____.

A.The Moon

B.The exploration (探索) of the Moon　　

C.Men to the Moon

D.The manned spacecraft

八年级英语阅读理解中等难度题查看答案及解析

We all need a healthy environment, but we produce waste every day and it is bad for our environment and health. Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment. Here are some ideas for you to live a green life.

Remember these three words: reduce, reuse and recycle.

Reduce means “use less”. Don't waste things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think if it is really necessary or maybe the old one will be just as good! When we do buy things, choose local products if possible, and try not to buy too many things from foreign countries.

Reuse means “use again”. Use things for as long as possible. When we buy things, make sure that they last a long time. We should take care of them so that they will last, and we should repair the old things if we can instead of throwing them away and buying new ones. Don't use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them again.

Recycle means “change something into other things”. Although it takes energy to change something into other things, it’s better than throwing things away or burning them. Find out what can be recycled in your neighborhood and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees.

Title: 1.　 to Live a Green Life

八年级英语其他题中等难度题查看答案及解析

The earth is about 4,600 million years old. Modern man has lived on the earth for only 35,000 years, but during that time, we have changed our planet(行星) in many ways. Many of the things that we have done are good, but more are not good for the earth.

Water pollution

A lot of people, birds and fish die each day because of water pollution. Factories have polluted the land and the water. As a result, many rivers and lakes are now dead.

Air pollution

In big cities, factories, as well as cars, trucks and buses are the main cause of air pollution. Many people in cities now have serious health problems. For example, Mexico city used to be a beautiful sunny capital, but today it is always covered by thick brown clouds.

Soil pollution

In order to have a good harvest(收成), most of the farmers use chemicals (化学的)too much in their fields. That’s bad for the soil. But this kind of pollution is difficult to stop.

Hope for the future

These problems are very serious for our future, so all of us should do something to improve our environment. If we can stop pollution, our planet will become more and more beautiful and our health will be better. Let’s be greener people!

1._____ have made the earth change a lot.

A. Human beings　 B. Animals

C. Plants　 　　　　 D. People in other planets

2.There are _____ kinds of pollution in this passage.

A. two　　 B. three

C. four D. five

3.Pollution isn’t a big problem now, is it?

A. Yes, it is. 　 B. No, it isn’t.

C. Yes, there is. D. No, there isn’t.

4.Which sentence is NOT right according to the passage?

A. Because of water pollution, many rivers and lakes are now dead.

B. We must stop the factories from pouring waste water into the rivers and lakes.

C. Most of things that we have done are good for our planet.

D. Water pollution is very serious nowadays.

5.Which sentence is RIGHT?

A. Though Mexico city is always covered by thick brown clouds, it’s still a beautiful sunny capital.

B. Air pollution can make people sick.

C. Now fewer farmers use chemicals in the fields.

D. Factories, cars, trucks and buses are the main cause of soil pollution

八年级英语阅读理解中等难度题查看答案及解析