The scientists in China are trying ______ways...

The scientists in China are trying ______ways to reduce pollution.

A. look for　　 B. find out.　　 C. to look for　　 D. found out

八年级英语单选题中等难度题查看答案及解析

The scientists in China are trying __________ the ways to reduce the fog and haze (减少雾霾)．

A．look for　 　　 B．to look for

C．to find out　　 D．find out

八年级英语单选题中等难度题查看答案及解析

The scientists in China are trying __________ the ways to reduce the fog and haze (减少雾霾)．

A．look for　 　　 B．to look for

C．to find out　　 D．find out

八年级英语单项填空中等难度题查看答案及解析

Scientists are trying to 　　　　 ways to treat the terrible disease called H7N9.

A. come up with　　　　 B. give in　　　　 C. talk about　　　　 D. give up

八年级英语单项填空中等难度题查看答案及解析

It’s reported that scientists from different countries are trying to _______ a good way to solve the energy problems.

A. keep up with　　 B. catch up with　　 C. come up with　　 D. meet up with

八年级英语单选题中等难度题查看答案及解析

There are different ways in which people try to deal with the problem of energy. One way is the greater production of common energy sources, such as coal, oil and gas. The trouble with these sources, however, is that they are not renewable.

Another way is energy conservation（节能）, which means using energy more efficiently（有效地）. In some very cold countries people build special houses to save energy. They place materials between the inside and the outside of the walls of the house to keep the cold out and the warmth in. The house is heated by the lights, the body heat of the people and the other equipment in it.

Finally, renewable energy sources are used even though they are often expensive to develop. One form of these is geothermal energy. In certain parts of the world, the temperature of the earth increases 30℃ with each kilometer down. At six kilometers, therefore, it rises to nearly two hundred degrees. To get the heat, water is pumped down into the rocks and back up to the surface. Heat from the earth is already used in certain countries.

1.From the passage we learn that oil______.

A.is quite easy to produce B.is not used most efficiently

C.is the most common energy source D.could be renewed only by new ways

2.Why are the “special houses” mentioned in the passage?

A.To keep the cold out and the warmth in.

B.To show the excellent skills of the builders.

C.To be an example of energy conservation.

D.To be heated by different sources of energy.

3.If the surface temperature is 15℃, how deep will you dig to get a temperature of 105℃?

A.One kilometer. B.Two kilometers.

C.Three kilometers. D.Four kilometers.

4.Where does the heat of the earth come from?

A.The rocks inside the earth. B.The water pumped into the earth.

C.The temperature of the earth. D.The water on the surface of the earth.

八年级英语阅读单选困难题查看答案及解析

Trees are one of the oldest "citizens (公民)" of our Earth. They keep our air clean, reduce noise pollution, improve water quality and provide food and building materials.

Just like us, trees change a lot as they grow. At l to 3 years old, young trees learn how to protect themselves. For example, many trees grow thorns (刺) to warn animals not to go near. Most young trees have large, deep green leaves so that they can catch enough sunlight and change it into their food and energy.

When trees are 4 years old, they begin to grow very quickly and become strong enough to face challenges(挑战). At the age of 15, trees become young adults. They grow more slowly and begin to produce flowers and fruit.

It is not until the tree is 20 to 25 years old that it becomes a real adult. The tree reaches its largest size. The adult tree gives us shade, oxygen（氧气）and natural beauty; it is also a great place for a tree house, or a place for us to read a book, listen to music and so on. If we give the adult tree proper care, it will go on to live for many years.

Gradually, trees begin to grow older and older and even die. At this time, they still have the important place in nature. When a tree becomes hollow (空心的) or part of it becomes dead, it provides a home to small animals and is a source(来源) of food for many other animals.

In many ways, the life of a tree is similar to our own life experience. When we are looking at the life of a tree, we learn about that each period(时期) of life brings its own joy and challenge. Enjoy every minute of the life of the trees and take care of the trees!

1.What can it be used as when a tree becomes hollow?

A. Food for all animals B. place for a tree house

C. Shade and beauty for people D. A home to small animals

2.Put the following in the right order according to the passage.

①Grow very rapidly　　　　 ②Become a real adult　　　　 ③Have large, deep green leaves　　 ④Grow older and die　　 ⑤Produce flower and fruit

A. ①-③-⑤-②-④ B. ③-⑤-①-②-④

C. ③-①-⑤-②-④ D. ②-①-③-④-⑤

3.Why should we enjoy every minute of our own life according to the passage?

A. Because our life is becoming better and better.

B. Because trees give us so much and make our world beautiful.

C. Because each period of life brings its own joy and challenge.

D. Because the life of a tree is similar to our own life experience.

4.The best title for the passage should be ____.

A. The life of a tree B. The ages of trees

C. The use of a tree D. The death of a tree

5.Which of the following shows the structure(结构) of the passage?

(1=paragraph(段落)1　　 2=paragraph 2……)

A.  B.  C.  D.

八年级英语阅读单选困难题查看答案及解析

Scientists are trying to make the deserts （沙漠）into good land again. They want to bring water to the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming deserts all the time. Scientists may not be able to change the deserts. Scientists think that people make deserts. People are doing bad things to the earth.

Some places on the earth don’t get much rain. But they still don’t become deserts. This is because some green plants are growing there. Small green plants and grass are very helpful(有帮助的) to dry places. Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the earth away. When a little bit of rain falls, the plants hold the water. Without plants, the land can become deserts much more easily.

1.Why can the land become deserts?

A. Some places don’t get much rain.

B. Plants don’t let the hot sun make the earth even drier.

C. People don’t keep the earth well.

D. Scientists haven’t learnt enough about the deserts.

2.Scientists want to 　　　　 to make the deserts into good land again.

A. carry water　　　　 B. grow food

C. do nothing　　　　 D. study a lot

3.Why are green plants and grass helpful?

A. They can hold the water.

B. They can stop the wind from blowing the earth away.

C. They can keep the earth wet.

D. All the above.

4.After reading this, we learn that　　　　　　　　　 .

A. it is good to get rid of (去除) the grass in the deserts

B. all places without much rain will become deserts

C. plants can keep (阻止) dry land from becoming deserts

D. it is better to grow crops（农作物）on dry land than to grow grass

八年级英语阅读理解中等难度题查看答案及解析

Scientists are trying to make the deserts(沙漠) into good land again. They want to bring water to the deserts，so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming desert all the time. Scientists may not be able to change the deserts. People are doing bad things to the earth.

Some places on the earth don't get much rain. But they still don't become desert. This is because some green plants are growing there. Small green plants and grass are very helpful to dry places. Plants don't let the hot sun make the earth even drier. Plants don't let the wind blow the earth(泥土) away.When a little bit of rain falls，the plants hold the water.Without the plants，the land can become a desert much more easily.

1.Why can the land become a desert?

A. Some places don't get much rain.

B. Plants don't let the hot sun make the earth even drier.

C. People are doing bad things to the earth.

D. Scientists haven't learnt enough about the deserts.

2.Scientists ______to make the deserts into good land again.

A. carry water　 B. grow food

C. do nothing　 D. study a lot

3.Which is NOT true?

A. The land never stops becoming desert.

B. Scientists ask the people to live in the deserts and grow food there.

C. People do bad things to the earth.

D. Scientists may not be able to change the deserts.

4.Why are green plants and grass helpful?

A. They can hold the water.

B. They can stop the wind from blowing the earth away.

C. They can keep the earth wet.

D. All the above are right.

5.Which is the best title(题目) for the passage?

A. The Desert Problem.

B. People Make Deserts.

C. Green Plants and Grass.

D. The Desert，the Tree and theWater.

八年级英语阅读理解中等难度题查看答案及解析

Scientists are trying to make the deserts into good land again. They want to bring water into the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming desert all the time. Scientists may not be able to change the desert in time. Why is more and more land becoming desert? Scientists think that people make deserts. People are doing bad things to the earth. Some places on the earth don’t get much rain. But they still don’t become deserts. This is because some plants are growing there. Small green plants and grass are very important to dry places. Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the dirt away. When a little bit of rain falls, the plants hold the water. Without plants, the land can become a desert much more easily.

阅读短文回答问题。

1.What are scientists trying to do now?

______________________________________

2.What happens to the earth?

______________________________________

3.Why is more and more land becoming desert?

_____________________________________

4.Are plants important to the desert?

______________________________________

5.What can plants do ?(回答一条即可)

_______________________________________

八年级英语任务型阅读困难题查看答案及解析