Joe and Jack are ____ (谈论) about the year 2020. "What will our world be like in the year 2020?" "I don't know," says Jack. "What do you think?" "Well, no one ____ (知道), but it's interesting to guess." "In the year 2020, ____ (千) of people will buy a pocket computer. The computer will ____ （改变） people's life. They will give people the answers to all their questions. We shall all have ____ (电话) in our pockets, too.

    And we'll be ____ （能够） to talk to our friends all over the world. ____ (也许) we can see them at the same time." "A lot of people will live and work under the sea. Perhaps there will be big towns, factories and farms under the sea, too." "____ (机器) will do most of the work, so people will have more ____ (空闲的) time, perhaps they'll work only two or three days a week. They can fly to the moon by spaceship." "I'm looking forward to ____ (参观) the moon!" "And I hope I can live under the sea." says Jack " Won't that be interesting? Just like a fish!"