【推荐1】The world got a glimpse（一瞥）of one of the greatest mysteries of our universe（宇宙）on April 10. That's when the first image of a black hole was shown to the public. The picture was created by a network of eight radio telescopes（射电望远镜）.

“We have seen what we thought was unseeable ,"says Shep Doeleman. He led the effort to create the image.

The black hole is at the center of galaxy（星系）named Messier 87,some 55 million light-years from the earth，and is 6.5 billion times the mass of the sun.

The image shows the gas，dust，and stars that move around the black hole before disappearing into it. It does not truly show the black hole，because not even light can escape its gravity. Black holes, like vacuums, suck（吸）in everything that gets too close.

根据短文内容，选择最佳答案。
1. In paragraph 1，the underlined word “image" probably means___________.

A．truth

B．fact

C．picture

D．information

2. In paragraph 2，the underlined sentence means seeing the black hole___________.

A．was expected before	B．was unexpected before
C．is common	D．is impossible

3. The black hole lies___________ the Messier 87 galaxy.

A．in the middle of	B．in the front of
C．at the back of	D．on the top of

4. What will probably happen if a spaceship gets close to the black hole?

A．It will fly around it.

B．It will be covered by the dust.

C．It will be sucked in.

D．It will be discovered.

5. What's the best title（标题）for this passage?

A．The Black Hole and its Gravity	B．First Look at the Black Hole
C．The Mystery of the Universe	D．Faraway Galaxy

【推荐2】China has taken a whole new step in its moon exploration. President Xi Jinping on Dec. 17, 2020 congratulated the complete success of the Chang’e-5 mission(任务) that brings back the country’s first samples collected from the moon. Following America and Russia, China has become the third country in the world to collect rocks from the moon.

Chang’e-5 first took off from the Wenchang Spacecraft Launch Site in Hainan on November 24, 2020. It landed on a massive lava plain (熔岩平原) of the moon on December 1, 2020. Then it started to collect the samples. The samples may help scientists understand more about the moon’s origins. It may help work out how the moon comes into being and how it develops. Hopefully, the success of the collection will set an example for other more difficult missions in the future which will be carried out on other planets.

After the returning capsule (太空舱) landed back on Earth, it will be taken to Beijing by plane, where the capsule will be opened and the samples will be ready for study. “China will also provide some of the samples to scientists in other countries”, said Pei Zhaoyu, a director at the CNSA.

As the Chang’e-5 mission has been completed successfully, Chinese scientists are already making plans for future moon exploration, including project to build a scientific research station on the moon. “We hope to work together with other countries to build the international lunar scientific research station, which could provide a shared platform for lunar scientific exploration and technological experiments,” Pei said.

1. The Chang’e-5 mission was to ________.

A．try a circle around the moon

B．help other countries to bring back the rocks

C．send congratulations to other countries from the moon

D．bring back the rocks from the moon to the Earth

2. The Chang’e-5 started to collect the samples ________ after it took off.

A．a month

B．about a week

C．twenty-four hours

D．twenty-three days

3. What does the word “origins” in Paragraph 2 mean in Chinese?

A．起源

B．未来

C．温度

D．地形

4. Which of the following is true?

A．Three countries have collected rocks from the moon since the 1970s.

B．China will build the international lunar scientific research station alone.

C．Some of the samples may be shared with other countries scientists.

D．The capsule will be sent to Hainan for further study.

5. The passage is mainly about ________.

A．the future plans to explore the moon

B．the place where Chang’e-5 landed or

C．the purpose of collecting samples from the moon

D．China’s success in completing the Chang’e-5 mission

【推荐3】How much do you know about Earth—the planet that we live on? Our knowledge of Earth has been developing since ancient times. However, many puzzles (谜) about Earth remain unsolved. Live Science has published a list of the eight biggest mysteries about Earth. Let’s look at some of them.

Where did water come from?

When it first came into being 4.5 billion years ago, Earth was a dry rock. So where did all of our water come from? Scientists think that it might have arrived in the form of ice by an asteroid (小行星) from outer space that hit our planet. But this idea has not been confirmed (证明) because there is very little related evidence(相关证据) to be studied.

What’s in the core (地核)?

Scientists used to study meteorites (陨石) as small examples of Earth, believing that Earth’s core was made of iron and nickel (镍). However, a later study in the 1950s proved this way to be wrong because it found that Earth would be too light to provide gravity (引力) if its core contained only iron and nickel. Today, scientists continue to bring forward different ideas, but none have been confirmed.

How was the moon born?

Scientists have found that the chemical compositions (成分) of Earth and the Moon are very similar. That suggests that the Moon actually came from Earth. For example, it could be a piece of Earth that separated when Earth hit another planet. It is also possible that when Earth first came into being, it spun (旋转) very fast and threw off enough molten (熔化的) rock to later form the Moon.

1. What’s the main idea of the passage?

A．How Earth came into being.

B．Where Earth’s water came from?

C．How the moon was formed?

D．Unexplained mysteries about Earth.

2. What do we know about where water may come from?

A．Earth’s water may come from ice that melted 4.5 billion years ago.

B．Earth’s water may come from a small planet that hit Earth.

C．We don’t know where water came from.

D．There is lots of evidence that tells us where water came from.

3. What does the underlined phrase “bring forward” in Paragraph 5 probably mean?

A．Check	B．Raise
C．Improve	D．Receive

4. Which of the following is TRUE according to the passage?

A．Scientists used to believe Earth’s core was made of meteorites.

B．A study in the 1950s proved that Earth’s core is made of iron and nickel.

C．The moon and Earth are made of similar materials.

D．Three possibilities of where the Moon came from are mentioned.

【推荐1】As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger.
Scientists have found out that radiation(辐射) is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of radiation from the sun and other stars, which is bad for their health. Some special medicine may work a little, but there’s no really helpful medicine.
Space junk is also thought a great danger to spacemen. It’s reported that there are 9,000 man-made things flying in space. About 30% of these are man-made satellites(卫星),10% are spaceships, and the rest are space junk. An explosion(爆炸) in 1996 made a cloud of 300,000 fragments(碎片), each at least 4 mm in size, and even a small piece of these knocked against a spaceship window and did some damage. Scientists are working on helpful ways to do with space junk.
Although space is really dangerous, it interests everyone on the earth. In the near future, it may become usual for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space for a few years. So we should care for space and do something to help improve the space environment.
1. ________ of man-made things in space are space junk.

A．10%

B．30%

C．60%

D．80%

2. _______ is/are the most dangerous to spacemen.

A．Satellites

B．Radiation

C．Fragments

D．Space junk

3. What can people do in space in the near future? ________

A．They can only live and travel in space.

B．They can grow some fruit and vegetables in space.

C．They can find out ways to solve all the problems in space.

D．They can spend a few days or live for a few years in space.

4. The purpose(目的) of the writer who writes the passage is mainly to _________ .

A．introduce what the space is like to us

B．talk about some important space travels

C．tell us the space environment and to care for space

D．show us how interesting the life of the spacemen in space

【推荐2】Beijing—No Car Day was first started by 34 cities in France on September 22, 1998. It was started to protect the environment. By now, more than 1,000 cities around the world have had a No Car Day.
The first No Car Day in China was in Chengdu in 2001. Other cities, including Beijing, Taipei, Shanghai and Wuhan also support the day.
In Beijing, more and more people are joining in the activity. It asks drivers to leave their cars for one day each week and walk, take a bus or subway or ride a bike to work. The slogan（口号）for the activity is,“If we drive for one less day, we can have one more nice day.” Beijing is trying to have 238 blue sky days this year. In the first quarter of this year Beijing only have 52 blue sky days. This was 11 days less than the number for the same period last year. Car exhaust(汽车尾气) is one of the most important reasons of the pollution. We must do more for No Car Day.
So far, more than 200,000 drivers have shown their support. “We can’t control the weather, but we can choose not to drive.” said Wu Zonghua, a car club chairman.
1. There are_______ cities in China that support No Car Day according to the passage.

A．three

B．four

C．five

D．six

2. The activity of No Car Day encourages Beijing drivers                 .

A．not to work on No Car Day

B．to enjoy having a one-day holiday

C．to leave their cars at home to repair

D．to take a bus, or subway, ride a bike or walk instead of driving to work

3. According to the passage there were           blue sky days in the first quarter of last year in Beijing..

A．52

B．63

C．41

D．238

4. The air pollution in Beijing is mainly caused（导致）by           according to the passage.

A．cars

B．dust

C．weather

D．rubbish

5. We can know from the passage that        .

A．more and more people in Beijing are joining car clubs

B．drivers should leave their cars for one day each month

C．more than 1,000 cities around the world have a No Car Day.

D．more people in the world won’t drive any more

【推荐3】Many years ago, Lake Ponkapog in Hartwell, New Jersey, was full of life. Many birds and animals lived beside the water, which was full of fish. Now there are few birds, animals, and fish. The lake water is polluted. It is in a colour of dirty（脏的）brown, and it is filled with strange plants.

How did this happen? First, we must think about how water gets into Lake Ponkapog. When it rains, water comes into the lake from all around. In the past, there were forests all around Lake Ponkapog, so the rainwater was clean.

Now there are many homes around the lake. People often use chemicals（化学品）in their gardens. They use other chemicals inside their houses for cleaning or killing insects（昆虫）. There are also many businesses. Businesses use chemicals in their machines or shops. Other chemicals fall onto the ground from cars or trucks. When it rains, the rainwater picks up all the chemicals from homes and businesses and then carries them into the lake. They pollute the water and kill the animals.

Boats on the lake are also a problem. Lake Ponkapog is a popular place for motorboats. But oil and gas（汽油） from boats get into the lake. So more bad chemicals go into the water this way.

People in Hartwell are worried. They love their lake and want to save it. Will it be possible? A clean lake must have clean rainwater going into it. Clean rainwater is possible only if people are more careful about chemicals at home and at work. They must also be more careful about gas and oil and other chemicals on the ground. And they mustn’t use motorboats any more on the lake. All these may change people’s lives. Only then can Lake Ponkapog be a beautiful, clean lake again.

1. In the past, the water in Lake Ponkapog was made clean by ________.

A．birds

B．rain

C．forests

D．fish

2. Chemicals from homes and businesses ________.

A．are always clean	B．can help the animals
C．are good for the lake	D．get into the rainwater

3. Cleaner rainwater will mean ________.

A．more boats on the lake	B．more dirty things in the lake
C．a cleaner lake	D．a dirtier lake

4. To save Lake Ponkapog, people need to ________.

A．be more careful about chemicals	B．use less water
C．grow fewer plants in the gardens	D．use more motorboats on the lake

5. The passage is about ________.

A．boats on Lake Ponkapog	B．why the water is dirty in Lake Ponkapog
C．clean rainwater	D．dirty lakes

【推荐1】Look at the picture. This is our school. There are six buildings in our school. There are thirty-two classrooms in the teaching building. Our sports hall is behind the teaching building. Our library building is next to the office building. There are many books and magazines (杂志) in the library. Is the library building next to the science lab building? No, it’s in front of it. There are seven labs in it. Behind the science lab is the dining hall. In the dining hall there are many tables and chairs. We have meals there. Welcome to our school.

1. Our school has got _________ buildings.

A．2

B．3

C．5

D．6

2. The teaching building is ________ the sports hall.

A．behind

B．in front of

C．near

D．next to

3. The library building is _________ the office building.

A．next to

B．behind

C．on

D．in front of

4. The library building is in front of ________.

A．the teaching building	B．the sports hall
C．the science lab building	D．the office building

5. The students have meals in ________.

A．the dining hall

B．the library

C．the science lab

D．the offices

【推荐3】We know the mosquito (蚊子) very well. Mosquitoes fly everywhere. They can be found almost all over the world, and there are more than 2,500 kinds of them.

No one likes the mosquito. But the mosquito may decide that she loves you. She? Yes, she. It’s true that male mosquito doesn’t bite and only the female mosquito bites because she needs blood to lay eggs. She is always looking for things or people she wants to bite. If she likes what she finds, she bites. But if she doesn’t like your blood, she will turn to someone else for more delicious blood. Next time a mosquito bites you, just remember you are chosen. You’re different from the others! If the mosquito likes you, she lands on your body without letting you know. She bites you so quickly and quietly that you may not feel anything different. After she bites, you will have an itch (发痒) on your body because she puts something from her mouth together with your blood. By the time the itching begins, she has flown away.

And then what happens? Well, after her delicious dinner, the mosquito feels tired. She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, hundreds of eggs.

1. How many kinds of mosquitoes are there in the world?

A．There are 2,500 kinds of them.	B．There are over 2,500 kinds of them.
C．There are only 2,500 kinds of them.	D．There are less than 2,500 kinds of them.

2. The mosquito is always looking for ________.

A．people she dislikes	B．things or people she doesn’t want to bite
C．things or people she wants to bite	D．animals she doesn’t want to bite

3. Which of the following sentences is TRUE?

A．The itch begins before the mosquito bites you.

B．Female mosquitoes need blood to lay eggs.

C．You feel terrible when the mosquito bites you.

D．All the mosquitoes like to bite people for blood.

4. What does the writer mainly want to tell us?

A．Mosquitoes are harmful.	B．Some facts about mosquitoes.
C．The kinds of mosquitoes.	D．We should stay away from mosquitoes.

5. Where can we read this passage?

A．In a guide book.	B．In a fashion magazine.
C．In a school newspaper.	D．In a science book.

【推荐2】Have you ever pay attention to the Air Quality Index（空气质量指标）or AQI reported in the newspaper？The AQI helps us understand what the air quality around us means to our health. The AQI uses colors，numbers and words to tell us about the air. Let's see what these colors and numbers mean.

AQI colors	AQI numbers	Health word（s）	What to do
Green	0-50	Good	Just enjoy the clean air！
Yellow	51-100	Moderate	Air quality is fine for most people
Orange	101-150	Unhealthy for sensitive（敏感的）groups	Active children and adults and people with lung（肺）disease should spend less time outdoors
Red	151-200	Unhealthy	People with lung disease and active kids and adults shouldn't spend too long time outdoors. Everybody else should try to spend less time outside.
Purple	201-300	Very unhealthy	People with lung disease and active kids and adults should not spend any time outdoors. Everybody should try not to go outside.

1. If the Air Quality Index is _________, the air quality is good for most people.

A．orange

B．red

C．purple

D．yellow

2. We use ___________ to tell about the quality of the air.
①color        ②weather     ③words       ④numbers

A．①②③

B．②③④

C．①③④

D．①②④

3. From the passage we can know that __________.

A．If the AQI color is purple，the air is the best for people

B．people with lung disease are very sensitive to the air

C．the AQI can't help people to know the air quality

D．if the AQI number is 140，the AQI color will be red

【推荐3】Which hand do you use when write? About 8 to 15 percent of people are left handed. They often have to use tools that are designed for right-handed people. So it is difficult for left-handers to use most tools. If you are right handed, try this experiment: Take a knife with your left hand and try cutting a potato into pieces. Don’t be surprised if you feel awkward（别扭的）.
       In the past, people thought it was strange to use the left hand. Young students looked down upon their left-handed classmates. Some children were even punished for using their left hand to write. But these days parents and teachers have accepted that. In almost every school in the world, left-handed students can use their left hand to write.
       What causes people to be left handed or right handed? Experts have searched long and hard on this. They conclude（得出结论） that left-handed people are left handed for the same reason that right-handed people are right handed. One out of every ten people just is a left-handed people are right handed. One out of every ten people just is a left-hander. It’s simply like the color of our eyes – some people have brown eyes, while some others have black eyes.
       However, may researchers think that left-handers and right-handers are different in some aspects. Right-handers are more talkative and outgoing than left-handers. Many right-handed people understand spoken words better. For example, after they listen to directions to a supermarket, they can find it easily. Right-handers are good at organizing people, too. They are also better basketball guards. Just ask Yao Ming.
       Research shows that left-handers are creative and artistic. Many famous performers, like Jim Carrey and Paul McCartney, are left handed. Many left-handers learn better visually（在视觉方面）. In art, both Leonardo da Vinci and Michelangelo were left handed. In music, Ludwig van Beethoven was left handed. In science, you find Newton and Einstein. The left-handed people are also really good at tennis and other single sports.
       If you prefer one hand, but you are still good at writing with the other, you are mixed. Research shows mixed-handers can remember everyday things better than other people. What did you eat for lunch two weeks ago? If you’re mixed handed, you can probably remember.
1. If right-handers cut up potatoes with there left hand, they will      .

A．get hurt	B．give up cutting
C．feel awkward	D．change their tools

2. What is Paragraph 2 mainly about?

A．Causes of being left handed.

B．Encouragement to left-handers

C．Punishment for using the left hand.

D．Changes in opinions on left-handers.

3. According to the passage, right-handers      .

A．learn better visually

B．are good organizers

C．are better at single sports

D．give clear directions to others

4. From the passage, we can learn that left-handers .

A．may be more talkative and outgoing

B．are ordinary people like right-handers

C．might remember everyday things better

D．no longer need to use right-handed tools