s will slow down by themselves or stop in dangerous situations. Also, our cars\rwill run on electi·icity or water.\rBy 2050 our homes will be more environment-friendly. We will use clean energy, and we will recycle our .\rwater. There will be many more people in the world and our houses will be smaller and many will be underground.\rWe will have robots to help clean, cook and do our home shopping.\rBy 2050 there will be too many people on the ea,th and over 100 million people will be living on the moon\rand other planets. And the best news may be that we won't die! We will put our brains onto computers and live\rforever. The computers of the future won't look like machines. They'll look like humans.\r(停顿25秒)听力考试到此结束 。