Most people, when they travel to space, would like to stay in orbit for a few days or more. And this stands to reason, if you’re paying $20,000 for your trip to orbit. So in order for tourism to reach its full potential there’s going to be a need for orbital accommodation - or space hotels. 【小题1】 Hotels in orbit will offer the services you expect from a hotel - private rooms, meals, bars. But they’ll also offer two unique experiences: impressive views - of Earth and space - and the endless entertainment of living in zero gravity - including sports and other activities that make use of this.

The hotels themselves will vary greatly - from being quite simple in the early days to huge luxury structure at a later date. It’s actually surprising that as late as 1997, very few designs for space hotels were published. 【小题2】

Lots of people who’ve been to space have described vividly what it’s like to live in zero gravity.【小题3】 Luckily, you don’t need to sleep much living in zero gravity, so you’ll have plenty of time for relaxing by hanging out in a bar with a window looking down at the turning Earth below.

【小题4】 And so after a few days you’ll find yourself heading back though you’ll be much more expert at exercising in zero gravity than you were when you arrived. You’ll be thinking how soon you can save up enough to get back up again - or maybe you should change jobs to get to work in an orbiting hotel.

Paper is one of the most important products ever invented by man. Wide spread use of written language would not have been possible without some cheap and practical material to write on. The invention of paper meant that more people could be educated because more books could be printed and distributed. Together with the printing press, paper provided an extremely important way to communicate knowledge.

How much paper do you use every year? Probably you cannot answer that question quickly. In 1900 the world's use of paper was about one kilogram for each person a year. Now some countries use as much as 50 kilograms of paper for each person a year. Countries like the United States, England and Sweden use more paper than other countries.

Paper, like many other things that we use today, was first made in China. In Egypt and the West, paper was not very commonly used before the year 1400. The Egyptians wrote on a kind of material made of a water plant. Europeans used parchment for many hundreds of years. Parchment was very strong; it was made from the skin of certain young animals. We have learnt of the most important facts of European history from records that were kept on parchment.

Neuralink has shared a video which appears to show a monkey playing a video game. That’s fairly unusual, but what makes the video even stranger is that the monkey is playing the video game with just its mind. Neuralink is a company owned by Elon Musk, who also owns the car company Tesla and the rocket company Space X. Neuralink is working to develop devices that could allow people to control things using just their brains.

The monkey in the video is called Pager. Pager has two of Neuralink’s special “Link” devices planted in his brain by a surgeon. These devices are connected to 2,048 wires which lead to the parts of Pager’s brain that control movements of the arms and hands.

Scientists taught Pager to play a video game. At first, Pager controlled the video game using a joystick, which is a normal gaming controller. But as Pager played, his Link devices wirelessly sent out information about the signals his brain was using to control his arms and hands. Neuralink’s scientists recorded all of these signals. Then they used computers to match up the signals from Pager’s brain to the movements that his hands were actually doing. This was challenging work and the scientists counted on artificial intelligence(AI) to help them decode(解码) Pager’s brain signals.

Neuralink wants to make it possible for humans who have lost the ability to control their bodies to interact with the world around them. Mr. Musk says that in the near future Neuralink hopes to allow a paralyzed（瘫痪的) person to control a smartphone just by thinking. One day, the system will be able to send this information in a different way, allowing paralyzed people to use their arms or legs again.