Tom and Fred were talking about the year 2050.

　　“What will   1  be like in the year 2050?” asked Tom.

　　“I don’t know,” said Fred. “What do you think?”

　　“Well, no one knows. But it is __2__ to guess,” said Tom. “In the year 2050 everybody will carry a pocket (袖珍) __3___. The computer will give people the __4__ to all their problems. We shall all have telephones in our pockets,__5___ . And we’ll be able to talk to our friends all over the world. Perhaps(也许) we’ll be able to ___6__ them at the same time. Machines will do ___7___of the work, and people will have more__8__. Perhaps they will work only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there.”

　　“I’m very _9__to hear that. I hope to fly to the moon. And I hope I’ll be able to live _10___,” said Fred. “Won’t that be interesting? Just like a fish.”

We live on the earth. We use the sea around us. What do we take from the ocean? And what do we give to it?

We take fishes from the ocean—millions of kilograms of fish, every year, to feed millions of people.  1.   We take minerals(矿物) from the ocean. We can get salt by evaporating(蒸发) seawater.  2.    Many other minerals, such as gold, can be also got from the sea, but not by simple evaporation. 3.    Seaweed(海草) becomes food of many kinds— even candy, and ice cream—as well as medicine. Believe it or not, fresh water is another gift from the sea. We can’t drink ocean water.   4.   But ocean water becomes fresh water when the salts are removed. In the future, we will find ourselves depending more and more on fresh water from the sea.

The sea gives us food, fertilizer, minerals, water and other gifts. What do we give the sea? We pollute the ocean all the time. 　 5.　 Throwing waste into the ocean is killing off sea life. Yet as the world population grows, we may need the sea and its gifts more than ever.

We are finally learning that if we destroy our sea, we might also destroy ourselves. Hopefully, it is not too late.

 根据以上内容，从下列五个选项中选择适当的句子还原到短文中，使短文完整与正确。将其标号在答题卡上涂黑。（每小题2分，共10分）