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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"(41)cars.We won't have so many accidents,(42)because
they will be able to communicate with each other.Cars will slow down by themselves or stop in(43)dangeroussituations.Also,our cars will(44)runon electricity or water.
By 2050 our homes will be more eco-friendly(環(huán)保).We will use solar(太陽的)energy,and we
will clean and (45)recycle our water.There will be many more people in the world(46)and
our houses will be smaller.Many houses will be underground and we will have (47)robots to help clean,cook and do (48)ourhome shopping.
We won't die!We will put our brains onto computers and live (49)forever.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 (50)over100 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.