五.语法填空 (20分)
We ofter think of future. We often wonder ____1____ the world will be like a hundred years’ time.
Think of    2    space. Perhaps a permanent station on the moon    3      （set up）. Perhapes people will be able to visit the moon as    4       . Cheap rockets for space travel will have been developed,     5     （permit） long journeys through the solar system. When that time comes, people will be taking holidays in space and visiting    6       planets. Great propress will have been made     7    medicine, too. Pollution will have been controlled in a hundred years’ time.
8     the world will have been developed—even Antarctica. We will have used up most of the earth’s land to build our cities,      9     floating cities will have been built. The Japanese have already plans of this kind. And there will be cities   10         the sea.