How many things can you see in the night sky? A lot! On a clear night you can see the moon, some planets, and thousands of sparking (闪烁的) stars.
You can see even more with a telescope (望远镜). You might see that many stars look larger than others. You might see that some stars that look white are really red or blue. With bigger and bigger telescopes you can see more and more objects in the sky. And you can see those objects in more and more detail.
But scientists believe there are some things in the sky that we will never see. We won’t see them with the biggest telescope in the world on the clearest night of the year. That’s because they’re invisible. They’re the mysterious dead stars called black holes.
You might find it hard to imagine that stars die. After all, our sun is a star. Year after year we see it up in the sky, burning brightly and giving us heat and light. The sun certainly doesn’t seem to be getting old or weak. But stars do burn out and die after billions of years.
As a star’s gases (气体) burn, they give off light and heat. But when the gases run out, the star stops burning and begins to die.
So next time you look up at the night sky, remember: there’s more in the sky than we can see!
1. The underlined word “invisible” in the passage means “________” in Chinese.
| A．听不见的 | B．看不见的 | C．摸不着的 | D．闻不见的 |
| A．a planet | B．a sky | C．a star | D．a moon |
| A．give off heat | B．get weak | C．run out | D．burn |
| A．The sun certainly seems to be getting old and weak. |
| B．We might see that some stars that look white are really red and blue with a telescope. |
| C．We might see that many stars look larger than others with a telescope. |
| D．There’s more in the sky than we can see. |
| A．How stars burn out | B．What dead stars are |
| C．How we can see more stars | D．How telescopes develop |
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【推荐1】People around the word 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 at once. But do you know it has something to do with a computer scientist Katie Bouman. Without her, there won’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 had tried. 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 part 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 because of her work. The young woman, however, is modest. She said the success mainly depends 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．Because it is too big for us. | B．Because it is too far from us. |
| C．Because it is too dark to see. | D．Because it is as small as an orange. |
| A．By taking a photo of an orange carefully. |
| B．By working on a special computer program. |
| C．By turning telescope data into a photo of a black hole. |
| D．By using more advanced cameras with the help of others. |
| A．A surprising photo | B．A great photo of a black hole |
| C．Make your dream come true | D．A photo of a black hole and Katie Bouman |
Do you know something about space? It is an amazing place! The solar system（太阳系）is in space.
Around the sun
There are eight planets in the solar system. We live on one of them—the Earth! Each planet moves in a way around the Sun. The Earth is called the Blue Planet because there is so much water on it and it looks blue in space.
Around the moon
The Moon is much smaller than the Earth.
| A．It gives us everything and it’s our home. |
| B．It travels around the Earth. |
| C．Around the earth |
| D．The Sun is in the center of the solar system. |
| E．It is made up of the Sun and the eight planets around the Sun. |
| F．Each planet moves around the Earth. |
| G．Around the space |
【推荐3】Do stars only appear at night? The answer is no. Venus is the one and only star that can be seen in daytime. It shone at its brightest in the night sky on Feb 17 this year. Venus is the second planet from the sun. It is the second brightest natural object, behind Earth’s moon, in the night sky. Why is it so bright?
First of all, Venus is the closest planet to Earth. It is also covered by highly reflective clouds, which can reflect about 70% of the sunlight striking it, almost twice as much as Earth does.
Some are calling 2017 the year of Venus, because the planet is at its brightest twice this year. Venus gets brighter when it goes further away from the sun, and nearer to the Earth. The brightest moment happened once in February, and will happen again, during daylight, on April 30.
If Venus is so bright and close to us, isn’t it a better choice for human exploration(探索) than Mars? It is closer to Earth than Mars and it’s closer to Earth in size. The closer distance to the sun means solar power would be easier to produce as well.
However, with a temperature of about 465℃ on the surface, Venus is the hottest planet in our solar system! But scientists never give up. Recently, a team of NASA and Russian scientists created new computer equipment that can stand temperatures of 480℃. It can work under Venus-like conditions for almost 22 days.
1. The next step, according to the scientists, is to send a probe (探测器) to Venus by 2025.Which of the following about Venus is NOT true？
| A．It’s the only star that can be seen in daylight. |
| B．It’s the second planet from the sun. |
| C．It’s the brightest natural object in the night sky. |
| D．It’s the closest planet to Earth. |
| A．it can reflect about 35% of the sunlight. |
| B．it goes further away from the sun and nearer to the Earth. |
| C．it is closest to the sun and furthest from the Earth. |
| D．the dates are Feb 17 and April 30 every year. |
| A．The closer distance to Earth. | B．the similar size to Earth |
| C．Too much solar power to use | D．The extremely high temperature. |
a. was created by some UK scientists
b. can stand temperatures of 480℃
c. can work for about 22 days on Venus
d. will be sent to Venus by 2025
| A．ab | B．bc | C．cd | D．ad |
● Don’t bring any bags into the reading room.
● Don’t eat in the reading room.
● Keep quiet in the library. Don’t answer the phone in the reading room.
● You can borrow three books at one time and you can keep them for one month.
● You should keep the books clean.
● If you lose the books, you must pay for them.
My name is Jeff. I am a student. Here are the rules in my school.
● Don’t be late for school.
● Don’t eat in class.
● Don’t fight.
● Don’t run in the hallways.
● Wear the school uniforms on school days.
1. If Clark goes to the library, he can ________.
| A．eat oranges in the reading room | B．borrow three books at one time |
| C．take his bag into the reading room | D．write down something on the books |
| A．May 7th | B．June 1st | C．June 7th | D．July 1st |
| A．he lost a book from the library |
| B．he bought a book from the library |
| C．he didn’t keep the books clean in the library |
| D．he answered the phone in the reading room |
| A．Five. | B．Six. | C．Ten. | D．Eleven. |
【推荐2】Taking care of pets can be a great way to teach children responsibility. If you’re interested in bringing an animal into your home and you’ve designed a plan for its proper care, here are some choices.
FISH  First-time owners should consider getting cold-water fish as no tank heater is required. They should research what kinds of fish get along in the same tank, and know that some goldfish can live up to 20 years. |
RABBITS  Though rabbits may seem like a lovely choice, they can live up to ten years and require much care similar to that of a dog or cat. They have their special diet needs, and often don’t behave well around small children. |
GUINEA PIGS  These small animals are suitable for starter pets. Their cages must be cleaned daily, and they require toys to keep their ever growing teeth in check. Once they’re used to the new way of life, guinea pigs need daily exercise in a small room without holes for escape. |
BIRDS  Birds require feeding at the same time each day. Cages should be cleaned daily and disinfected weekly. Birds clean themselves by bathing in dishes of water and grow in cages big enough to spread their wings and fly a short time. |
Word Bank tank 鱼缸 diet 饮食 cage 笼子 escape 逃跑 disinfect 消毒 |
1. What are the pets advised in the passage except?
| A．Rabbits. | B．Cats. | C．Guinea pigs. | D．Birds. |
| A．Some cold-water fish which get along well. |
| B．Some warm-water fish which get along well. |
| C．Some cold-water fish and some warm-water fish. |
| D．Only one cold-water fish or warm-water fish. |
| A．Five years. | B．Ten years. | C．Twenty years. | D．Thirty years. |
| A．Tank heaters. | B．Cages. | C．Toys. | D．Holes. |
| A．The officers working for WWF. | B．The workers from the local zoo. |
| C．The reporters for the Animal World. | D．The kids hoping to raise pets at home. |
【推荐3】A mini-program on WeChat has changed people’s lives at West Lake, as they can now make appointments(预约) to sell recyclables—things that can be recycled.
For a long time, the problem of recyclable rubbish troubled restaurants and hotels around the lake. Lots of recyclables have low value and high recycling costs,so collectors don’t feel like recycling them door-to-door.
In order to solve the problem, the Management Committee of West Lake Scenic Area worked with a company to develop the Jingling Recycle mini-program. Now, people can make an appointment on WeChat, and the next day collectors will come to pick up recyclables. The mini-program helps people to deal with plastic bottles, foam packing cases(泡沫包装箱), cardboard (硬纸板), newspapers and other low-value recyclables. People are paid to sell them.
The local people speak highly of the mini-program. “No collectors came to my restaurant in the past. Thanks to the Jingling Recycle mini-program, it has changed. I can make a little money by selling recyclables. At the same time, it protects the environment,” said the owner of a restaurant.
1. The mini-program is used for making appointments to ________.| A．buy takeaway | B．sell recyclables | C．buy clothes | D．sell desserts |
| A．high value and low recycling costs | B．low value and high recycling costs |
| C．high value and high recycling costs | D．low value and low recycling costs |
| A．are against the mini-program | B．don’t like the mini-program |
| C．think the mini-program is useless | D．think the mini-program is helpful |
| A．Recyclable rubbish troubled hotels around the lake for long. |
| B．The mini-program can help to protect the environment. |
| C．People can make a lot of money by selling recyclables. |
| D．The mini-program has changed people’s lives at West Lake. |
| A．A cool mini-program. | B．How to sell recyclables. |
| C．Things that can be recycled. | D．How to make appointments. |
