Life in the 21st century will be from life in the 20th century. The population(人口) will grow fast. There will be more and more people in the world and most of them will live than before. Robots will do much dangerous and hard work. People will work hours than they did in the 20th century, and they will have more free time for sports, watching TV and traveling. More and more people will go to other countries for .
I hope everyone will have a happyin the 21st century.