Today I want to blog about a question that has been discussed many times—whether students can surf the Internet in the classroom. Our principal and teachers are afraid that unhealthy websites may be accessible to us. 
Actually, every coin has two sides. We still think that surfing the Internet can bring us much more benefits and make our study more convenient. First of all, there are a wide range of learning resources on the Internet. Furthermore, we can keep track of various news online. Last but not least, as high school students, we are forming our judgment and we will keep what our principal and teachers say in mind.
I do hope we can have access to the Internet and that our principal and teachers can take my view into consideration.

With the development of the computer, virtual reality (虚 拟 现 实 ) steps in our life. If something is virtual, then it is created by computer technology and appears as if it were real.VR is a computer system with a special headset(耳机). When you put on the headset, you will look at two tiny television screens. They are so close to your eyes that you see just one picture and you will believe that you have entered a different world. In many systems, you also wear special gloves. With the gloves you can reach out and touch things in the unreal world.
The first VR games, which have already been sold around the world,enable you to drive a sports car,fly a plane, or fight an enemy.In the future, it may be difficult to tell the virtual world of the games from the real world outside. However, VR is not just for entertainment. One day, delighted children will be able to learn history by visiting the pyramids of Egypt. In addition,businesses will be able to use VR for many tasks. Pilots will be able to practise flying virtual planes before they go into the air. VR can help us improve the world in hundreds of ways.
However, some people have warned that there could be dangers. It might be dangerous if we do something wrong, or if people do not want to return to reality because the virtual life is safer than real life. Besides, we may forget how to live and work with real people.
There will be some problems with VR, as it is new for us. However,one thing is for sure: VR is here to stay. Get ready to step into another world!

VR is a computer system with a special headset and special gloves, which enables people to enter an unreal world.(要点1) It is applied to more and more fields, such as entertaining people,educating children, dealing with businesses and training pilots. (要点2) However, it might be dangerous if people don't use it properly. (要点3) In conclusion, no matter what problems it brings, VR is sure to be part of people's life in the near future. (要点4)

In our modern world, when something wears out, we throw it away and buy a new one. The problem is that countries around the world have growing mountains of rubbish because people are throwing away more rubbish than ever before.
How did we become a throwaway society? First of all, it is now easier to replace an object than to spend time and money repairing it. Thanks to modern manufacturing(制造业)and technology, companies are able to produce products quickly and inexpensively. Products are plentiful and cheap.
Another cause is our love of disposable products. As busy people, we are always looking for ways to save time and make our lives easier. Companies produce thousands of different kinds of disposable products: paper plates, plastic cups, and disposable plastic bags, to name but a few.
Our appetites for new products also contribute to the problem. We are addicted to buying new things. Advertisements persuade us that newer products are better and that we will be happier with the latest products. The result is that we throw away useful possessions to make room for new ones.
All around the world, we can see the consequences of this throwaway lifestyle. Mountains of rubbish just keep getting bigger. To decrease the amount of rubbish and protect the environment, more governments are requiring people to recycle materials. However, this is not enough to solve our problem.
Maybe there is another way out. We need to repair our possessions instead of throwing them away. We also need to rethink our attitudes to repair. Repairing our possessions and changing our spending habits may be the best way to reduce the amount of rubbish and take care of our environment.

Nowadays, it's not an uncommon phenomenon that more and more high school students open their own blogs on the Internet.  
On the one hand, blogs provide them with a colorful window to show their talents and a way to relax, which makes it more and more popular among high school students.
On the other hand, many parents and teachers are worried about it. They are afraid that managing a blog will take a lot of time and energy, which will have an adverse effect on their study.
In my opinion, we should learn to make the most of this useful tool to communicate and show ourselves.