2 . In many science fiction (科幻) movies, men travel to faraway stars and even fight with aliens. But are there real aliens in the universe (宇宙)? The answer of some scientists is yes. So they have been searching for aliens in outer space for many years. They hope io find life signs of aliens.

Some scientists are used to using radio telescopes (望远镜) to search for aliens in space. In order to find aliens, they have worked hard for over half a century, but so far they have found nothing. Then some scientists guessed aliens might not want to connect us, but aliens could answer our messages. So some scientists sent radio signals into the universe. They hope one day they would be picked up by alien technology. These scientists want to prove (证明) that we are not alone in the universe.

But what should we do if the “alien phone” rings one day? Should we answer it? Stephen Hawking, the famous physicist, thought it could be dangerous to connect aliens. He said that the main purpose of aliens’ visiting to our solar system could be searching for our resources (资源). But other scientists think we have no need to worry. David Morrison. a NASA scientist, said, “If an alien radio signal reaches the earth from a planet thousands of light-years away, then they almost surely have solved all the problems we still have including the short of resources. Maybe they are much smarter than us, but why don’t they hurt us? I think we can try to connect them.”

根据短文内容，选择最佳答案
1. ______ scientists believe there are aliens.

A．Few

B．Some

C．Most

D．All

2. Scientists have worked hard to find aliens for ______.

A．more than 50 years

B．50 years

C．40 years

D．30 years

3. What is Stephen Hawking’s opinion?

A．Aliens are dangerous.	B．Aliens are friendly.
C．Aliens can’t be found.	D．Aliens have been on the earth.

4. Why does David Morrison think we want to connect aliens?

A．Because we want to find aliens.	B．Because aliens are much smarter than us.
C．Because we want to help aliens.	D．Because aliens have many skills.

5. What the best title for passage?

A．How to Use Radio Telescope.	B．Stephen Hawking’s Idea.
C．Protect Our Earth.	D．Are We Alone?

3 . Some scientists believe that Mars is the planet with the highest chance of supporting human life away from Earth.

They believe that it’s possible for human to reach Mars by 2030. However, there are many things to prepare before this can happen.     1     Recently, scientists have sent robots to Mars to gather information about the planet.

Putting people on Mars will include (包括) planning how a person will live on Mars. At its shortest distance, Mars is 55 million kilometers away from Earth.     2     And astronauts would have to stay on Mars for over 18 months before Earth and Mars are at their closest distance again. The difficulties would include how much food and other things would be needed for over two years in space and how such things would be carried.

    3     They would need to prepare both their minds and bodies for such a long trip away from Earth. NASA set up a special research building in Hawaii. A group of astronauts stayed in this research building for 366 days. During their stay, they had to deal with what they might have to deal with on Mars.     4     They had to live with each other in a very small space. They also had to deal with the problems of having lots of time with little or nothing to do. They couldn’t receive help from people outside for the whole time they were inside.

    5     There is no doubt about it.

根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺，内容完整。

A．Astronauts have been the key to the plan.

B．For example, they had to be fed with bad food.

C．One day humans will be able to live on Mars.

D．Scientists must make some research on Mars well.

E．So it would take about 6 months for a one-way trip.

4 . 阅读填空

Are we alone in space? Is the Earth the only planet that has life?     1     Now we may get one step closer to the answers.

On Feb. 22nd, NASA said they found seven Earth-like planets.     2     The planets go around a dwarf star（矮星）called Trappist-1. It is much smaller and cooler than our sun. They are about 39 light-years（光年）from the Earth.     3     But scientists say it’s a little close.

    4     If you lived on one of them, you could possibly see the clouds around the next planet. More importantly, three of the planets are at the perfect distance（距离）from the Sun.     5     If there is liquid water（液态水）, there could be life.

For scientists, the finding is not an end. Next, they will try to find out if the planets have atmospheres（大气层）.

A．It means there could be liquid water on them.

B．That seems too far away from us.

C．These are big questions in the science world.

D．The seven planets are very close to one another.

E．They all nearly have the same size as Earth.

5 . The universe (宇宙) is everything out in space. Nobody _______ how large the universe is. When we talk about the universe, we _______ the Earth, the Sun, the Moon and all the stars, and the space between them.

Now let me tell you something about the _______. It is like a large ball. It _______ around the Sun. And _______ and land cover it. If you are in a spaceship and _______ the Earth from space, you will find that there are some large blue parts. They are the seas and about 70% of the Earth’s surface (表面) is water.

We live on the outside part of the Earth. Around us is the air. It takes the Earth 24 hours to turn in a full _______. When you see the Sun shining _______, it’s the day for you. But when the Earth turns you away from the Sun, everything around you becomes _______.

Can you tell me something else about the universe? I’m ________ in it and want to learn more about it.

1.

A．studies

B．knows

C．asks

D．forgets

2.

A．protect

B．leave

C．mean

D．see

3.

A．universe

B．Sun

C． Earth

D．Moon

4.

A．goes

B．waits

C．shows

D．keeps

5.

A．water

B．ice

C．snow

D．cloud

6.

A．watch

B．hear

C．feel

D．touch

7.

A．world

B．circle

C．part

D．way

8.

A．easily

B．brightly

C．quickly

D．slowly

9.

A．cleaner

B．brighter

C．warmer

D．darker

10.

A．honest

B．lucky

C．interested

D．tired

8 . We all live on Earth and enjoy our life every day. Do you know all the interesting facts about the Earth?

The Earth is not round.

Do you think the Earth is round? Will the Earth is not completely round.

The Earth is really old.

Grandmas and grandpas are old, but the Earth is much older. Scientists think that the earth is about 4.5 to 5 billion (十亿) years old.

Much of the Earth is water.

About 70% of Earth is water, and only about 30% of Earth is land.

Earthquakes happen all the time.

Earthquakes (地震) take place all the time. But most of the time, they are very small and human beings cannot even feel them.

________.

There are many mountains on Earth. Mount Everest is the most famous one because its peak is five and one-half miles above sea level. It is the highest. There are more interesting facts about the Earth. Can you tell us some?

1. How old is the Earth?

A．4 billion.

B．4.5 billion to 5 billion.

C．5 billion.

D．5 billion to 5.5 billion.

2. How many facts are mentioned (被提到) in the passage?

A．Three.

B．Four

C．Five.

D．Six.

3. Which sentence can be put in the blank (空格)?

A．Many mountains.

B．Mount Everest is very famous.

C．Mount Everest is five and one-half miles high.

D．Mount Everest is the highest mountain.

4. What’s the best title for the passage?

A．Facts about Earth	B．The earthquake
C．Life on Earth	D．Mountains on Earth

10 . We live on Earth. It’s our home. But how much do you know about it? Let me tell you something about our Earth. The Earth is like a huge ball. Like the other seven planets（行星）, the Earth is running around the sun. It’s the third nearest one to the sun. It takes the Earth about 365 days to run around the sun. At the same time, the Earth is going around itself. If you are in space, you can see lots of white clouds over the surface（表面）of the Earth. Through the clouds, you can see the blue colour of the oceans, and the brown colour of the land. About 70% of the Earth is covered with water. Why do we have day and night? When the half of the Earth is facing the sun, it’s daytime. As the Earth turns, and this half is away from the sun, night is coming. And it’s daytime for the other half.

1. How many planets are running around the sun?

A．Seven.

B．Eight.

C．Seventy.

D．Ten.

2. ______ of the Earth is covered with water.

A．50%

B．30%

C．About 70%

D．About 30%

3. Which of the following sentences is TRUE?

A．All the planets and stars are running around the sun.

B．The Earth is the nearest planet to the sun.

C．It takes the Earth about 365 days to run around the sun.

D．Only the Earth runs around the sun.

4. When ______, it’s daytime.

A．the Earth is running around the sun

B．the Earth is away from the sun

C．the half of the Earth is away from the sun

D．the half of the Earth is facing the sun

5. Where can you read this passage?

A．In storybooks.	B．In newspapers or magazines.
C．In cartoon books.	D．In fiction（科幻）stories.