We often think about future.we otfen want to know w____ the world will ba like in one hundred years' time.
T____ of space.maybe there will be a space station on the moom in the f____maybe people will be able to v____ the moom as tourists.scientists will make cheap rockets for space travel.when that time comes peoplewill ba able to take h____in space.people will make more progress in medicine,too.there will also be less and less p____ on the earth in one hundred years time.and then people on the earth will live m____ healthily.
As there will be more ang more people in the world,nearly every corner in the world will have been develope-e____ .antarctica.we will have used up most of the earth's land to b____our cities,so there may be some cities on the water.the japanese already have plans of this kind.and there will be cities u____the seas too.