【推荐1】It may be difficult to imagine by the year 2100, we will live on Mars. Our own planet, the Earth is becoming more and more _______ and polluted. Luckily, we can start again and build a better world on Mars.

First of all, transport should be much better. _______, our spaceships are too slow to carry large numbers of people to Mars - it takes months. However, by 2100, Spaceships can travel at half the speed of light. It might take us two or three days to get to Mars.

Secondly, humans need food, water and air to live. Scientists should be able to develop plants that can be grown on Mars. These plants will _______ the food and the air that we need.

There is still another _______ for us to live on Mars. Mars makes us much lighter than the Earth does. This will be dangerous because we could easily jump too high and fly slowly away into space. To _______ this, humans on Mars have to wear special shoes to make themselves lighter.

Life on mars may be better than that on the Earth in many ways. People will have more space. Living in a large building with 10 bedrooms is highly _______. Many people believe that robots will do most of our work.

However, life on Mars may not be better than that on the Earth today. Meals will probably be in the form of pills and space travel will make many people feel ill.

Life in the future will be different, but what will the changes be? As we all know, _________ COVID-19 broke out, many students all over the country could only study online. In the future, it will probably become the most important way of _________. One exciting thing is that people will have more free time to relax because they will _________ for fewer hours. Now we can only travel to different places on the earth, but people in the future may go to other _________ to spend their vacations.

There will be changes in the _________ too. More land will be used for building new cities. As a result, there will be less _________ for animals like cows and sheep, so meat will be more expensive. Maybe people won’t eat it every day, and they will eat more vegetables and fruit. If so, they will be _________ and live longer.

Work in the future will be different too. More smart robots will _________ in our lives. Then it won’t be necessary for people to do the _________ work like mining(采矿) and saving people in the fire. However, people won’t have enough __________ to do. This may be a problem.