Weoftenthinkoffuture.Weoftenwonder

问题详情：

We often think of future. We often wonder __1__ the world will be like in a hundred years' time.

Think __2__ space. Perhaps a permanent station on the moon will have __3__(set up). Perhaps 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 progress 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 had plans of this kind. And there will be cities __10__ the sea.

1．______ 2.______ 3.______ 4.______ 5.______

6．______ 7.______ 8.______ 9.______ 10.______

【回答】

　　 set up　ists/visitors/travelers　itting　r　　　　r

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