【推荐1】How would you like a trip to the moon? Men have already landed there. Someday, the moon might be a popular place to visit. What would a trip to the moon be like? Here are some facts

There is no air or water on the moon. To stay alive, you would have to take your own oxygen and water. It's silent on the moon because there is no air. Sounds can't be carried from place to place.

What will the surface of the moon look like? The moon has great round holes in it. There were more than 30, 000 holes in all. The biggest one is 146 miles wide.

When you walk on the moon, you'll feel light on your feet. That's because you will weigh only about 20 pounds on the moon. You might forget what day it is on the moon because a moon day lasts for two weeks, But at least you won’t need a raincoat. It never rains on the moon. The weather on the moon never changes at all.

【推荐2】Many people can use the computers, but few of them know how to look after them.     1    

Keep your computer in a cool , dry(干燥的) room. Too much or too little heat is bad for computers.    2     Most computers work best at a temperature of 5℃~30℃.

Do not let people smoke near your computer. All kinds of smoke do harm to computers and they can cause many problems.

    3     If you eat near the computer, there will be pieces of food in the keyboard. And a little water may be terrible.

Make sure the glasses are right for your eyes. If you wear glasses, make sure these glasses are good for using the computer.     4    

Keep your screen clean and do not have it too bright.     5     A very bright screen can also be bad for your eyes. If you can afford one, buy a computer screen. It will be better for you than using the screen of a TV set.

【推荐3】Do you know why you get angry so easily, but your friend smiles all the time? It’s because you both have different personalities. Then what is personality? It’s about how people think, behave and react to everything around them.

So what makes people think and behave in certain ways? Part of the reason is that people are born like this. A baby gets its genes and blood type when it is still inside its mother. These may help decide what the baby will be like.

But one’s personality doesn’t stop here. Family life, school learning and life experiences can also make you the person you are. But this doesn’t mean you can’t change your personality. You can always try to make yourself better. Don’t get too worried if you don’t have a good personality. ★ This is a good way to start making changes.

For example, if you don’t know how to make friends, find out why. Is it because you’re too shy? If so, tell yourself to smile at people. Start talking to people kindly. But don’t give yourself a hard time about it all. After all, it’s not easy to change lifelong habits in one night. Just keep trying, one day you can see that you can turn over a new leaf and be a new you!

①At the first Olympic marathon in 1896, runners ran a shorter course (跑道) than today’s 42.195-kilometre event. Even so, the winner finished the race within three hours. However, runners have improved. On Oct. 12, 2019, 34-year-old Eliud Kipchoge from Kenya became the first person to run a marathon in less than two hours. Clocking in at 1:59:40, Kipchoge crossed the finish line. “No one is limited. This shows the spirit of sport,” Kipchoge told the BBC after the race in Vienna, Austria.

②Besides Kipchoge’s strong willpower and excellent physical condition, science and technology helped him achieve success. Hills and turns slow runners down, so Kipchoge’s team picked the best course in Vienna among many. The city’s cool and dry weather was also important. It helped keep Kipchoge’s body running better throughout the race. A special pair of shoes also played a big part. According to The New York Times, the shoes Kipchoge wore were designed to help anyone wearing them in a race perform much better.

③One other key to this achievement was Kipchoge’s pacing strategy (节奏策略). He ran with a dream team formed by sports scientists. Five runners formed a V-shape in front of Kipchoge, reducing drag (空气阻力), and two runners followed directly behind to push him forward. Kipchoge stayed in the centre of the formation (队形). The team changed members every five kilometres. There was also a car driving 15 metres in front of everyone, casting a bright light on the road to keep them on track.

④“Few world records today are technologyfree,” noted The Telegraph. Though hard work is still the most important part of sportsmen’s achievements, science and technology are helping them do better.

A．

B．

C．

D．

【推荐3】Computers, smartphones, and other machines are the perfect servants. They always do what they are “told”. We usually “tell” them to do things by using a mouse or keyboard. But what if we could just talk to them normally and tell them what to do?

This type of technology, known as voice control or voice recognition(识别), has been shown in films and TV shows since the 1960s. The TV show Star Trek showed some spaceships which could reply to human voice commands (命令). The film 2001: A Space Odyssey showed a computer that human astronauts could talk to. It was mainly used to play chess and repair the astronauts’ spaceship.

On the other hand, real-world voice recognition is used for more everyday tasks. For example, Apple and Amazon made two pieces of voice recognition software(软件). They can be asked to do many things, such as setting alarms and playing music and so on.

One of the nice things about voice recognition is that it can be used when we’re on the go. When you’re driving a car or walking down the street, it’s not convenient or even dangerous to pick up your smartphone and type on the keyboard. Voice recognition allows you to focus on whatever you’re doing at the moment while still doing other tasks.

A speech recognition software is also helpful to deaf people. It can be used to “listen” to spoken words and turn them into text that deaf people can read. Some speech recognition software can even hear words spoken in one language and then translate them into another language.

【推荐1】It happens in summer, lasts about 2 to 10 minutes and has small balls of ice that fall like rain. What could it be? It is hail (冰雹), also called hailstone or hailstorms.

Hailstorms often visit the United States. The area like Nebraska, Colorado and Wyoming would experience seven to nine hail days every year. The place with the most hail in the world is Kenya. It hails about 130 out of 365 days a year.

It’s hard to tell exactly when a hailstorm might come. They can cause lots of damage (破坏) to people, buildings, cars, plants and animals. In fact, hailstorms can even cause deaths. So we should know how to stay safe during it.

The best way to protect yourself from a hailstorm is to be prepared. We all should have our tools prepared all year round, and those tools should include helmets (头盔). They can help you save your head from both the hail itself and other things brought by heavy storms. Make sure you stay inside until the hail stops and stay away from windows. If possible, find a room at least one level down from the top of the house. If you get caught outside in a hail-storm, try your best to run into a house. If you can’t find a house to stay in, find something to protect your head. Remember that stay out of low land areas, because they could be filled with water. Avoid trees because they are also dangerous.

If you have your own Acme Rocket Launcher, you can create and send up rockets that show off your personality and creativity.

All you need is your Acme Rocket Launcher and a few simple household materials：

★ a 500 ml plastic cola bottle

★ scissors

★ colored markers（马克笔）

★ a poster board

★ glue

What to do：

Step 1 Clean the cola bottle from outside to inside and allow it to dry.

Step 2 Use markers to draw three small triangles（三角形）and one large triangle on the poster board. Cut out the triangles.

Step 3 Roll（卷起）the large triangle so that two of its sides touch and it forms a rocket’s nose cone. Glue the sides of the cone so that it holds its shape.

Step 4 Glue the nose cone to the bottom（底部）of the bottle to make the top of the rocket.

Step 5 Glue the smaller triangles to the other end of the cola bottle, around its opening. The triangles will be the tail fins.

Follow the instructions with your Acme Rocket Launcher and have a blast（爆炸）!

A．

B．

C．

D．