C.这种恶劣的气候条件下.生活是很艰难困苦的.故选hard. 40 Life in the twenty-first century will be very 1 . Many changes will take place, but 2 will the changes be. The population is growing 3 . There will be many 4 in the world and most of them will live 5 than people in the twentieth century. Computers will be much smaller and 6 and there will be at least one in every 7 . And 8 studies will be one of the important subjects in school then. People will work 9 and they will have more free time for sports, watching TV and travelling. 10 will be much easier and cheaper. And many more people will go to 11 countries for holidays. There will be changes in our 12 , too. Maybe no one will eat meat every day, instead, they eat more fruit and vegetables. Maybe people will be 13 . Work in the future will be different, too. 14 and hard work can be done by robots. Because of this, 15 will not have enough work to do .This will be a problem. 【查看更多】
