We often think of future.We often wonder what th

We often think of future.We often wonder what th
e world will be like in a hundred years' time.
Think of space,perhaps a permanent (永久的) station on the moon will have been set up.Perhaps
people will be able to visit the moon as tourists.Cheap rockets for space travel will have been developed,permitting long journeys throughout the solar system(太阳系).When that time comes,people will be
taking holidays in space and visiting other planets.Creat progress will have been made in medicine,too.
Perhaps a cure will have been discovered for the most terrible of all diseases-cancer.Pollution is a
problem we must solve.In a hundred years' time it will have been controlled.
All the world will have been developed-even Antarctica.There will be large cities in Antarctica.We
already have supersonic (超音速的) flight,but in a hundred years' time we will have supersonic land
travel as well.
We will have used up most of the earth's land tobuild our cities,so floating cities will have been built.
The Japanese already have plans for cities of this kind.And there will be cities under the sea.The first of
these will have been completed..