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The population of Earth is still going up. There will be less and less good land for growing crops in the future. People worry that there will not be enough food for everyone in the middle of this century.

Recently scientists have discovered one strange plant

named fedtschenkoi（玉吊钟）may help. It can absorb（吸收）carbon dioxide(CO₂)

at night. It only needs 10 times less water than food plants like beans. This means it

can grow in the desert(沙漠).

In which ways could this plant help us?

Since deserts are increasing in size because of the changes in Earth’s climate, growing plants there will be more and more important. Although it is dangerous to

eat this plant, scientists can still study something about it: how it absorbs CO₂ at

night while many other plants only do this during the day, and why it is suited to the

desert.

There is another direction to take the research in. Producing a desert plant to eat

will be difficult, but there is still possibility to use the genes(基因)from this plant and put them into food plants.

The other way is to grow this type of plant for fuel(燃料). At the moment we

grow plants for fuel in good land. If we do it in deserts instead, more good land can be used to grow plants for food.

Desert plants have special qualities, which could be an answer to our future food

or energy needs. Scientists are working hard on it.

The Desert Plant Could Help

The problems of the future

◆The population on Earth is becoming　 1.　 than before.

◆There is less and less　 2.　 land for growing crops.

◆There will not be enough food in the future, which makes people　 3.

The discovery of the scientists

◆It is an　 4.　 plant named fedtschenkoi.

◆Food plants like beans need 10 times　 5.　 water than it does in deserts.

The ways it could

6.　 us

◆The scientists are studying how it absorbs CO₂ and why it is

7.　 for living in desert.

◆It is　 8.　 to use genes from one plant and then put it inside another.

◆It will be better if we can grow plants for fuel in deserts　 9. than in good land.

Conclusion

◆Because desert plants have special qualities, it may　 10.

our food and energy problems in the future.

九年级英语填空困难题

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The population of Earth is still going up. There will be less and less good land for growing crops in the future. People worry that there will not be enough food for everyone in the middle of this century.

Recently scientists have discovered one strange plant

named fedtschenkoi（玉吊钟）may help. It can absorb（吸收）carbon dioxide(CO₂)

at night. It only needs 10 times less water than food plants like beans. This means it

can grow in the desert(沙漠).

In which ways could this plant help us?

Since deserts are increasing in size because of the changes in Earth’s climate, growing plants there will be more and more important. Although it is dangerous to

eat this plant, scientists can still study something about it: how it absorbs CO₂ at

night while many other plants only do this during the day, and why it is suited to the

desert.

There is another direction to take the research in. Producing a desert plant to eat

will be difficult, but there is still possibility to use the genes(基因)from this plant and put them into food plants.

The other way is to grow this type of plant for fuel(燃料). At the moment we

grow plants for fuel in good land. If we do it in deserts instead, more good land can be used to grow plants for food.

Desert plants have special qualities, which could be an answer to our future food

or energy needs. Scientists are working hard on it.

The Desert Plant Could Help

The problems of the future

◆The population on Earth is becoming　 1.　 than before.

◆There is less and less　 2.　 land for growing crops.

◆There will not be enough food in the future, which makes people　 3.

The discovery of the scientists

◆It is an　 4.　 plant named fedtschenkoi.

◆Food plants like beans need 10 times　 5.　 water than it does in deserts.

The ways it could

6.　 us

◆The scientists are studying how it absorbs CO₂ and why it is

7.　 for living in desert.

◆It is　 8.　 to use genes from one plant and then put it inside another.

◆It will be better if we can grow plants for fuel in deserts　 9. than in good land.

Conclusion

◆Because desert plants have special qualities, it may　 10.

our food and energy problems in the future.

九年级英语填空困难题查看答案及解析

If the population of the earth continues to increase , there will not be enough resources (资源) left to keep life on the planet. We will use up all the oil that drives our cars sooner or later .One possible way to work out the problem, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth’s resources are completely used, it will be possible to change the atmosphere of Venus(金星) and create a new world almost as large as Earth itself. The difficulty is that Venus is much hotter than the earth and there is only a little water there.
Sagan suggests that algae organisms(海藻组织) can live in very hot or cold temperatures and at the same time produce oxygen. They should be bred(养殖) in conditions similar to those on Venus. When this has been done, In a short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on but the rain will finally fall and in a few years something like earth will be reproduced on Venus.
1.The population growth on Earth will cause the lack(缺乏) of _________.
A.food B.oil C.space D.resources
2.What is one of the difficulties for the human race to live on Venus?
A.The shortage of the algae B.The shortage of carbon
C.The much hotter weather D.The much cooler weather
3.Which of the following statements about the algae is NOT true according to the passage?
A.It can live in very hot temperatures. B.It can live in very cold temperatures.
C.It can break down the carbon dioxide. D.It can provide enough food for man.
4.This passage is mainly about __________.
A.the possibility of living on Venus B.the population of the earth
C.the American scientist Sagan D.the weather of other planets

九年级英语阅读单选困难题查看答案及解析
--- There is still a copy of the magazine in the reading room. Will you go and borrow______?
--- No. I’d rather buy______ in the book shop after school.
A. one; it B. it; one C. one; one D. it; it

九年级英语单选题困难题查看答案及解析
—There is still a copy of this book in the library. Will you go and borrow _________?
—No, I will buy　　　　　　 in the bookstore.
A.one; it B.one; one C.it ; one D.it; it

九年级英语单选题简单题查看答案及解析
— There is still a copy of the book in the library. Will you go and borrow _____?
— No, I’d rather buy one in the bookstore.
A. one　　　 B. it　　　　 C. another

九年级英语单项填空中等难度题查看答案及解析
— There is still a copy of the book in the library. Will you go and borrow _____?
— No, I’d rather buy one in the bookstore.
A．one　　　　　　　　　　　　 B．it　　　　　　　　　　 C．another

九年级英语单项填空中等难度题查看答案及解析
— There is still a copy of the book in the library. Will you go and borrow _____?
— No, I’d rather buy one in the bookstore.
A．one
B．it
C．another

九年级英语单项填空中等难度题查看答案及解析
一There is still a copy of the book in the library. Will you go and borrow 　　　　 ?
一No， I'd rather buy 　　　　 on the Internet.
A. it； it　　　　　　　　 B. one； one
C. one； it　　　　　　 D. it； one

九年级英语单项填空中等难度题查看答案及解析
---There is still a copy of the book in the library. Will you go and borrow ________?
---No, I’d rather buy ________ in the bookstore.
A．it, one B．one, one C．one, it D．it, it

九年级英语单项填空中等难度题查看答案及解析
The population of the world ____ still ____ now.
A．has; grown B．is; growing C．will; grow D．is; grown

九年级英语单项填空简单题查看答案及解析