We often think of future.We often wonder what the world would be like in a hundred years’time.我们经常想到未来。我们总是在思考一百年内世界会是什么样子的。Think of space:Perhaps a permanent~1 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 We often think of the future. We often wonder what the world would be like in a hundred years’time. We often think of the future. We are always thinking about what the world will look like in a hundred years. Think of space: Perhaps a permanent ~ 1 station on the moon will have been set up. Performed people will be able to visit the moon as tourists .Cheap rockets for space travel will have been