1 . There must be something interesting. People around the world felt excited on the night of April 10, 2019. For the first time in history, people saw a photo of a black hole. The photo became popular immediately(立刻). But do you know it has something to do with a computer scientist Katie Bouman? Without her, there wouldn’t be this photo. Black holes are very far from us, so it is very difficult to take photos of them. It’s like taking a photo of an orange that is on the moon. Many scientists have tried it. However, none of them succeeded. These failures didn’t stop Bouman from trying. Several years ago, she started working on a special computer program. During the past years, she has improved the program many times. Finally, it turned telescope data(望远镜数据) into a photo of a black hole.
Bouman has received lots of praise(赞扬) because of her work. However, the young woman is modest. She said success mainly depended on her team. “None of us could do it alone,” she said. Would you like to make history as Bouman did? Set a goal for yourself and work hard at it. Maybe you will make it come true in the future.
1. When people saw a photo of a black hole for the first time, they felt very ________.| A．sad | B．excited | C．surprised | D．calm |
| A．it is too big for us | B．it is too far from us |
| C．it is too dark to see | D．it is as small as an orange |
| A．自豪的 | B．害羞的 | C．谦虚的 | D．开朗的 |
| A．Black holes are far from us. |
| B．Bouman improved the special computer program many times. |
| C．Bouman’s success mainly depended on herself. |
| D．Many scientists have tried to take photos of black holes but failed. |
| A．A Surprising Photo |
| B．A Great Photo of a Black Hole |
| C．A Dream about Bouman |
| D．A Photo of a Black Hole and Katie Bouman |
2 . Scientists think that there has been life on the earth for millions
Scientists has launched many spaceships to explore other planets in the solar system.Some spaceships have gone beyond the solar system. However, no one has discovered any life in space
Why has no one from other planets sent us a message? Have they tried
3 . NASA’s space scientists were closely watching a very large asteroid (小行星) that flew past Earth recently.
Asteroid 2015 DR215 was on NASA’s “close approach(接近)” list. But don’t worry, it was a safe distance (距离) away! It was thought to have passed Earth at a distance of 4.1 million miles away. So it was not a dangerous asteroid for us! The asteroid is around 1,600 feet wide, which is three times larger than the Great Pyramid in Egypt. What are asteroids? Asteroids are large space rocks in our solar system (太阳系). Sometimes they are called NEOs-Near Earth Objects. Until today, about 26,000 asteroids have passed Earth, according to NASA.
There are lots of asteroids that NASA watches all the time. They are usually 140 meters or above and can be a threat (威胁). The last big asteroid to actually hit Earth was 66 million years ago. This one caused the dinosaurs to die out. In fact, many smaller asteroids fly to Earth the whole time. But because of their much smaller size, they get burnt up in the atmosphere (大气层) before they hit Earth. Therefore, they can’t bring serious results.
1. What were the NASA’s scientists closely watching recently?| A．A strange plane. | B．A small spaceship. | C．A very small asteroid. | D．A very large asteroid. |
| A．The asteroid is around 1,500 feet wide. | B．The asteroid is around 1,000 feet wide. |
| C．The asteroid is around 1,600 feet wide. | D．The asteroid is around 1,400 feet wide. |
| A．200. | B．2,600. | C．26,000. | D．260. |
| A．The earth died out. | B．The dinosaurs to die out. |
| C．The animals died out. | D．The living things died out. |
| A．their size is so small |
| B．they get burnt up in the atmosphere(大气层) before they hit Earth |
| C．both A and B |
| D．they are afraid of the earth |
4 . Scientists always want to know more about the universe（宇宙）.
Years ago they knew many things about the moon. They knew how big it was and how far away it was from the earth. But they wanted to know more about it. They thought the best way was to send men to the moon.
The moon is about 384,000 kilometers away from the earth. A plane cannot fly to the moon because the air reaches only 240 kilometers away from the earth. But something can fly even when there is no air. That is a rocket.
How does a rocket fly? There is gas in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky.
Rockets can fly far out into space. They send spacecrafts to the moon. Spacecrafts with men in them have been to the moon. Several spacecrafts without men in them have flown to another planet much farther away from the moon. One day men may be able to go to any places in space.
1. Scientists have known _______ the moon is.| A．how long | B．how heavy | C．how soon | D．how far |
| A．by rocket | B．by plane | C．by satellite | D．by ship |
| A．there is no air in the plane so people can’t breathe |
| B．there is no air above 240 kilometers away from the earth |
| C．there is no gas in the plane so it can’t fly that far |
| D．the moon is too far away from the earth |
| A．keeping the man in the rocket warm | B．cooking food |
| C．making the rocket fly up | D．making the rocket lighter |
| A．The writer is not interested in getting to any place in space. |
| B．The writer thinks it is possible for rockets to go to any place in space. |
| C．The writer doesn’t believe it is possible to go to any place in space. |
| D．The writer thinks rockets can take men to go to the moon one day. |
When we talked about the space, we know the universe means the earth, the sun, the moon, the stars and so on in space. Many of the stars are so far away that we can’t see them.
Through our geography lessons, we know the earth goes around the sun, and the moon goes around the earth.
We have day and night because the earth keeps moving all the time. Just because the moon is closer to the earth than the sun, it looks much bigger than the sun. The sun is bright enough to give out very strong light. The moon can’t give any light at all, but it looks quite bright too. Why? In fact, the light from the moon comes from the sun. 1.But in fact the stars are much bigger and brighter than the moon.
There are still many other planets in the universe. But of all these planets, only on the earth there are living things. 2.People on the earth have studied the space all the time. They’ve sent many spaceships into the space many times. On 3rd and 14th November, 2011, Chinese scientists let Shenzhou VIII successfully dock with(对接) the Tiangong I twice. This is one of the greatest events in the history of China’s space.
1.2.
6 . Scientists think that there has been life on the earth for hundreds of millions of years. However, we have not found life on any other planets yet.
The earth is a planet and it goes around the sun. Seven other planets also go around the sun. None of them has an environment like that of the earth, so scientists do not think they will find life on them. The sun and its planets are called the solar system, and our solar system is a small part of much larger group of stars and planets, called the Galaxy or the Milky Way. There are billions of stars in the Galaxy, and our sun is only one of them.
Scientists have also discovered many other galaxies in the universe. They are very far away and their light has to travel for many years to reach us. So how large is the universe? It is impossible to imagine.
Scientists have sent spaceships to the planet Mars to take photos. They have even sent spaceships to travel outside the solar system. However, no spaceship has travelled far enough to reach other stars in our Galaxy.
Scientists have always asked the questions: with so many stars in the universe, are we alone, or is there life out there in space? Have there been visitors to the earth from other planets? Why has no one communicated with us? We do not know the answers... yet.
1. How long has there been life on the earth?| A．For hundreds of years. | B．For millions of years. |
| C．For hundreds of millions of years. | D．We don’t know. |
| A．the sun | B．the environment | C．scientists | D．life |
| A．found life on Mars | B．known how large the universe is |
| C．discovered many other galaxies in the universe | D．travelled to other stars in our Galaxy |
| A．The sun is a planet. |
| B．There are eight planets in our solar system. |
| C．The light from the stars in other galaxies can’t reach us. |
| D．Spaceships have visited most of the universe. |
| A．Anyone out there? | B．Life on the earth |
| C．The sun and the other stars | D．The stars at night |
1. The writer thinks ________ people would like to go to Mars by spaceship.
| A．no | B．a few | C．most |
| A．life | B．water | C．nothing |
| A．far away from | B．close to | C．behind |
| A．air | B．food | C．water |
| A．the earth | B．the moon | C．Mars |
It is said that there has been life on the earth for hundreds of millions of years. Is there life on other planets? The scientists found that n
Many other galaxies are far away from us. Their light has to travel for many years to
9 . Our nearest neighbour is the moon. In the sky, the moon and the sun seem to be of the same size because the moon is much nearer.
The moon makes the tides(潮汐)—the changes in the level of the sea. The moon and the sun together pull the sea. In some parts of the world, the difference between “high tide”(when the sea is very near to the land) and “low tide”(when the sea is far away from the land) is very big. This is very important for ships.
The moon is very different from the earth. Gravity on the moon is six times weaker than that on the earth. There isn’t any air. During the day, it is very, very hot but at night it is very, very cold. Nothing can live on the moon.
If the moon goes between the earth and the sun, we have an eclipse(日食) of the sun. The moon stops the light from the sun and we have night in the day.
If the earth goes between the moon and the sun, we have an eclipse of the moon(月食). The moon goes into the shadow(影子) of the earth and it disappears for a few minutes.
1. When the sea is far away from the land, we call it “________”．| A．high tide | B．low tide | C．shadow | D．gravity |
| A．five | B．six | C．seven | D．eight |
| A．the moon | B．the sun | C．the stars | D．the earth |
| A．The earth goes between the moon and the sun. |
| B．The moon goes into the shadow of the sun. |
| C．The moon goes into the shadow of its own. |
| D．The sun disappears for a few minutes. |
a. The moon and the sun are of the same size.
b. Gravity on the earth is 6 times stronger than that on the moon.
c. The changes in the level of the sea are called tides.
d. The moon itself pulls the sea and makes the tides.
e. When the sea is near to the land, a high tide may happen.
f. It is much hotter in the day but much colder at night on the moon.
| A．abcf | B．bcde |
| C．adef | D．bcef |
Amy: Hello, Tony.
Tony: Really? Would you like to tell me?
Amy: Of course. What do you want to know?
Tony:
Amy: Hundreds of millions of years.
Tony: Wow! So long.
Amy: Not yet. But they have discovered water on Mars.
Tony: That sounds very interesting. Have they found life on Mars?
Amy: No, they haven’t. And scientists have already found that there’s no life on the moon.
Tony:
Amy: Yes, that’s right. Oh, I want to return the book about journeys to space to Jack, but I can’t find him. Do you know where he is?
Tony:
Amy: Thanks a lot.
| A．Is there only life on the earth so far? |
| B．How long has there been life on the earth? |
| C．So have scientists found life on other planets? |
| D．He has been in the space museum. |
| E．I have been to the museum. |
| F．He has just gone to the school library. |
