用 方框中所给的单词完成短文,有两项多余 because, robots, over, recycle, dangerous,our, and, forever, safe, cars, run, or What will our world be like in 2050? We asked a group of experts to make their predictions about our future. By 2050 we will have “clever” 1.________. We won't have so many accidents, 2.________ they will be able to communicate with each other. Cars will slow down by themselves or stop in 3.__________ situations. Also, our cars will 4.________ on electricity or water. By 2050 our homes will be more environment­friendly(环保的). We will use solar(太阳的) energy, and we will clean and 5.________ our water. There will be many more people in the world 6.________ our houses will be smaller. Many houses will be underground and we will have 7.________ to help clean, cook and do 8.________ home shopping. We won't die! We will put our brains onto computers and live 9.________. The computers of the future won't look like machines. They'll look like humans. By 2050 there will be too many people on the earth and 10.________ 100 million people will be living on the moon and other planets. We will be able to travel to Mars and back in just three days.