【推荐2】If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers are overweight, and one of the reasons is their bad eating habits. They like eating “junk food”. What is junk food? It is food which contains (包含) a lot of fat, oil, salt and sugar.

It is true that eating too much junk food might be one of the reasons why the teenagers are overweight. However, unhealthy eating habits are the main reason. Some don’t have breakfast before they go to school. During the day, some don’t have a proper meal for lunch. They just choose the food they like to eat. Scientists did a survey at one school. As is shown in the survey, over 60% of students don’t like vegetables, and more than 50% of them don’t eat fruit every day. They prefer to eat food with a lot of salt, sugar or fat. Parents are worried about their unhealthy eating habits. How can we have a healthy diet? Here are some suggestions from the doctors.

* Don’t eat too much junk food.

* Don’t eat food with too much salt. Salt can cause high blood pressure in the future.

* Eat food with less fat, oil and sugar.

* Eat at least three kinds of vegetables and fruits every day.

【推荐1】Dec.27, 2019 was an exciting day for Chinese people. China's biggest and most powerful carrier rocket, the Long March 5, was successfully launched(发射)in Hainan that day.

The 57-meter-tall rocket is the tallest, strongest and the most technologically difficult rocket in China. Because the Long March 5 is much bigger than other rockets in the Long March series(系列), it has been given a funny name "Chubby 5".

The rocket is able to carry spacecraft(宇宙飞船)to low-earth orbit(近地轨道). The spacecraft weighs up to 25 tons-nearly the weight of 16 midsize cars. The payload capacity(有效负载能力)of the Long March 5 is about 1.5 greater than any other Chinese rocket. The Long March 5 is the third most powerful rocket in the world, following the United States' Falcon Heavy and Delta Ⅳ Heavy.

During the December launch, the Long March 5 successfully sent the Shijian 20 experimental satellite(卫星), China's largest and heaviest homemade satellite, into orbit.

Besides sending the satellite into space, the launch also tested several engineering technologies that were used to improve the rocket's design. It also tested key technologies that will be used to take the Chang'e 5 probe(探测器)to the moon.

In the future, the Long March 5 will be used for China's fifth lunar expedition(探月), as well as to place parts of China's manned(载人的)space station into orbit. "In 2020, we will use the Long March 5 to launch the Chang'e 5 probe to the moon and also send a probe to Mars," said Wang Xiaojun, a project manager of the Long March 5.

【推荐2】Look! There are cute goggles(护目镜) on your umbrella. They’re from China. They’re made of plastic(塑料). They help you see the road clearly(清楚地) on a rainy day.

Can you play ping­pong? This is a ping­pong robot teacher from Japan. Its name is Forpheus. It can teach you to play ping­pong. It can play with you, too.

Do you like candy? A 3­D printer can do this. It’s from the UK. You upload(上传) your photos or other pictures to the machine. And then you can make eight kinds of candies. In just five minutes, it can finish them! But one kind of candy is about 86 yuan.

BeachBot is a robot. It is from America. It is a good painter on the beach. It can paint a dog, a duck or a turtle(乌龟). It can paint lines.

【推荐3】Technology is developing fast and it has become an important part of our life. Then what will the world be like in the future?

3D food will be both delicious and nutritious (有营养的).     1     And we can go further.

Scientists believe that we just need to turn on a printer in the kitchen and then we can enjoy our favorite food whenever we like.

5G network will allow many more people to get information.     2     It is said that 5G promises download speed 10 to 20 times faster than 4G. For example, we can download a film within just l second.     3     There will be much bandwidth (宽带) and we can get unlimited information.

Underwater cities will provide more space.     4     We may turn to underwater homes, which will be built as low as 15 kilometers below the sea. And the different temperatures at the different depths of the sea can be used to provide power for the homes.

Space tour will be a piece of cake. For us common people on the earth, the dream of traveling around space will come true. In the coming years, space craft will be as popular as buses, trains and planes.     5     And even we will get used to living there.

【推荐1】Sweden has to be one of the coolest places for a kid to grow up in—First, they set up schools with no grades or classrooms, then came Monstrum’s amazing playgrounds and now, the coolest idea of all, “forcing” 13-year-olds to play Minecraft games as part of the classroom lessons.

They came up with the idea when the government of Sweden organized a national school competition called “Future City”. In Future School, students were asked to talk about what they thought of Sweden in the future.

It was such a success that teachers at Stockholm’s Viktor Rydberg school decided to continue this “out of the box” thinking by mixing Minecraft into the class for 13-year-old students.

According to the teachers, the game which challenges kids to use their imagination by building virtual (虚拟的) worlds complete with anything they would like to see in their future. This, they believe, will help them make better decisions as adults. It’s surprising for most people that all the buildings are being built in a virtual world.

So far, 180 13-year-old girls and boys have joined this unit. The teachers say that even parents who were a little worried about their kids playing video games at school now fully support this decision.

We wonder if any school in the US would even consider setting up schools with no grades or classrooms and how parents would talk about it. What do you think? Be sure to let us know, by adding your comments on the Internet.

【推荐2】When you hear Westerners say “Drop in anytime” or “Come and see me soon”, you should realize that it doesn’t mean you are welcome to come over to their house anytime. It’s wise to telephone before visiting someone.

Never accept an invitation unless you really plan to go. You may refuse by saying, “Thank you for inviting me, but I may not be able to come.” If you are unable to come after accepting the invitation, be sure to tell those who invite you in advance that you will not be there.

When you have accepted the invitation to a party or a dinner, it is polite to bring small gifts with you, such as bottles of drink, flowers and chocolate. Sometimes Westerners may take you out to dinner in a restaurant and it does not necessarily mean that he is going to pay the bill at the end of the meal. He might want you to go Dutch, which means each person pays his own bill.

【推荐3】Australia (澳大利亚) is the greatest island in the world. It is to the south of the equator(赤道) . So when it is hot summer in our country, it is cold winter in Australia.

Australia is big, but the population there is small. The population is the same as that of Shanghai a city in China.

Australia has many, many sheep. After a short drive from any town, you will see sheep around you.You can also find kangaroos. A kangaroo has a “bag” below its chest. The mother kangaroo keeps its baby in the bag. It is very interesting, isn’t it?