There will not be enough space to the earth i...

There will not be enough space to　　　　　　 the earth in the future.

A. live on　　　　　 　 B. live in

C. live on in　　　　 D. live in on

九年级英语单项填空简单题查看答案及解析

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

Will there be gardens in space?

Astronauts on board the International Space Station (ISS) recently made history by taking bites of some red romaine lettuce(生菜). They became the first humans to eat food that was grown entirely in space.

The lettuce was planted on the ISS in a small greenhouse called “Veggie”, which uses LED lights to help plants grow in space.

First, astronauts cleaned the lettuce with special sanitizing wipes and then ate it with some salad dressing.

“It was one small bite for man, one giant leap for our journey to Mars,” one astronaut Scott Kelly later posted on social media.

Space vegetables are part of the NASA experiment called “Veg-01”, a study on how plants grow away from the effects of Earth’s gravity. It will allow astronauts to grow and eat their own food during long space explorations.

“If we’re ever going to go to Mars someday, we’re going to need a spacecraft that is much more self-sustainable in its food supply,” said Kelly.

Growing fresh plants on a spacecraft may also provide oxygen and help astronauts alive, NASA said.

“Veg-01” started in May 2014. The first batch of vegetable took 33 days to grow in space before they were taken back to Earth for a safety check.

After making sure it was safe to eat, astronauts planted a second batch on July 8. They let the plant grow for another 33 days and were then able to eat it.

Astronauts usually only get some fruit and vegetables when a supply ship comes to the ISS. Now with the vegetables grown in space, they can eat whenever they want.

1.Veggie 　　　　 .

A. is a greenhouse where plants are grown　　 B. is built on Earth by astronauts

C. uses common lights to help plants grow　　 D. is the name of a plant grown in space

2.Scott Kelly’s words “It was one small bite for man, one giant leap for our journey to Mars” mean 　　　　 .

A. it is easy to grow plants in space with the help of LED

B. space plants will be of great help for astronauts during space explorations

C. it is a long and tough journey to Mars from Earth

D. astronauts will be able to leap to Mars as they want

3.The Chinese meaning of the underlined word “self-sustainable” is 　　　　 .

A. 自我保护的　　 B. 自圆其说的

C. 自相矛盾的　　 D. 自给自足的

4.The best title of the passage is 　　　　 .

A. Astronauts will go to Mars　　 B. Astronauts on the ISS

C. Astronauts can eat vegetables in space　　 D. Astronauts’ life in space

九年级英语阅读理解困难题查看答案及解析

Will there be gardens in space?

Astronauts on board the International Space Station(ISS) recently made history by taking bites of some red romaine lettuce(生菜). They became the first humans to eat food that was grown completely in space.

The lettuce was planted on the ISS in a small greenhouse called “Veggie”, which uses LED lights to help plants grow in space.

First, the astronauts cleaned the lettuce with special sanitizing wipes(消毒纸巾) and then ate it with some salad dressing(色拉酱).

“It was one small bite for man, one giant leap(飞跃) for...our journey to Mars,” one astronaut Scott Kelly later posted on social media.

Space vegetables are a part of the NASA experiment called “Veg-01”, a study on how plants grow away from the effects of Earth’s gravity(引力). It will allow astronauts to grow and eat their own food during long space explorations(探索).

“If we are ever going to Mars someday, we’re going to need a spacecraft that is much more self-sustainable(自给自足) in its food supply,” said Kelly.

Growing fresh plants on a spacecraft may also provide oxygen and help keep astronauts alive, NASA said.

“Veg-01” started in May 2014. The first batch(批) of vegetables took 33 days to grow in space before they were taken back to Earth for a safety check.

After making sure it was safe to eat, astronauts planted a second batch on July 8. They let the plant grow for another 33 days and were then able to eat it.

Astronauts usually only get some fruit and vegetables when a supply ship comes to the ISS. Now with the vegetables grown in space, they can eat whenever they want.

1.Who became the first humans to eat food that was grown completely in space?

___________________________________________________________________________

2.Where were the space vegetables planted?

___________________________________________________________________________

3.What does the NASA experiment “Veg-01”study?

It studies__________________________________________________________________

4.Besides providing food, what else are the fresh plants grown in space expected to do ?

___________________________________________________________________________

5.Why were the first batch of vegetables grown in space taken back to Earth?

___________________________________________________________________________

九年级英语任务型阅读困难题查看答案及解析

If the population goes on increasing,______in the future.

A. there will be no standing space　　 B. there will be no standing spaces

C. there will have no standing space　　 D. there will be no space standing

九年级英语单选题中等难度题查看答案及解析

There will be _______ space for living things on earth.

A. little and little    B. less and less  C. few and few    D. fewer and fewer

九年级英语单项填空简单题查看答案及解析

If you change the___ of the chairs and the apples, there will be more space in the office.

A.style B.material C.pattern D.position

九年级英语单选题中等难度题查看答案及解析

There will be_________space for wildlife in the world．

A. fewer and fewer　　 B. 1ess and less　　 C. fewer and less　　 D. 1ess and fewer

九年级英语单选题中等难度题查看答案及解析

Because of the COVID-19 (新冠病毒), some people________that there might not be enough food in store so they should buy as much as possible in case.

A.worried B.worry C.have worried D.will worry

九年级英语单选题中等难度题查看答案及解析

用括号内所给词的适当形式填空（每空不限一词）。

1.If you ___________(not be) careful enough in the exam, you will not get a good grade.

2.Our modern times need more and more ___________ (hero) for us to learn from.

3.Good habits are good for the ___________ (develop) of us teenagers.

4.The 30^th Olympic Games ___________ (hold) in London this summer.

5.— Look! He is shouting at his mother.

— Why is he so ___________ (polite)?

6.The group of students are discussing the question ___________ (active) to come up with the answer.

7.The Three-D film Titanic is the ___________ (wonderful) film I have ever seen.

8.The OBIS doctor is training the local doctors how___________ (deal) with the blindness.

9.Though my grandfather is in his ___________ (seventy), he has got a QQ number.

10.Lei Feng devoted himself to___________ (work) for the people all his life.

九年级英语单词拼写困难题查看答案及解析