2 . Do you know what will happen in the future? Life in the twenty-first century will be very ________ , I suppose. Many changes will take place, but ________ will the changes be?

As we all know the population in the earth is growing ________. There will be a great many ________ in the world and most of them will live ________ than people in the twentieth century.

Computers will be much smaller and ________ and there will be at least one in every ________. And ________ studies will be one of the important subjects in school then.

People will work ________ and they will have more free time for taking exercise, reading, watching TV and traveling all over the world. ________ will be much easier and cheaper. And many more people will go to ________ countries for holidays.

There will be changes in our ________, too. May be no one will eat meat every day. Instead, they eat more fruit and vegetables without pollution. Maybe people will be ________. Work in the future will be different, too. ________ and hard work can be done by robots. Because of this, ________ people will not have enough work to do. This will be a problem.

3 . Modern inventions have speeded up people’s lives amazingly. Motor cars ________ a hundred miles in more than an hour, aircraft cross the world within a day, while computers operate at lightning speed. Indeed, this love of ________ seems never-ending. Every year motor cars are produced which go even faster and each new computer boasts(吹嘘) of ________ precious seconds in handling tasks.

All these save time, but at a cost. When we lose or ________ half a day in speeding across the world in an airplane, our bodies tell us so. We get the uncomfortable feeling known as jet-lag(时差). Our bodies feel that they have been ________ behind in another time zone. Again, spending too long at ________ results in painful wrists(手腕) and fingers. Mobile phones also have their dangers: too much use may transmit harmful ________ into our brains.

However, how do we ________ the time we have saved? Certainly not relax, or so it seems. We are so used to constant activity that we find it ________ to sit down and do nothing or even just one thing at a   ________ . Perhaps the days are long gone when we might listen ________ to a story on the radio, letting imagination take us into another world.

There was a time when some people’s lives were devoted simply to the cultivation(耕作) of the ________ or the care of cattle. No multi-tasking there; their lives went on at a much gentler pace. There is much that we might envy about a ________ of life like this. Yet before we do so, we must think of the hard tasks our ancestors ________ . Modern machines have ________ people from that primitive(原始的) existence.