题目内容：

Life in 30 years will be different because many changes will happen, but what will the changes be?

The population （人口） is _____ fast. There _____ more and  more of people in the world and most of them will live longer than before. Computers  will be  ____ smaller and more useful. And studying on computers will be one of the important ______ in school.

People will work _____ hours than they are doing now, and they will have more free time for sports, watching TV and traveling.  ______ will be much cheaper and easier. And more people will go to other countries _____ holidays.

Many changes will be in our food, too. More land will be used for ______ new towns and houses. Then there must be less _______ for cows and sheep, so meat will be more expensive. People won't eat it every day, and they will eat more vegetables and fit instead. _____they will be healthier.

1.A. grow    B. growing    C. grew    D. grows

2.A. will have    B. will has    C. will are    D. will be

3.A. even    B. little    C. more    D. less

4.A. subject    B. subjects    C. way    D. ways

5.A. a few    B. fewer    C. a little    D. less

6.A. Watching TV    B. Exercising    C. Playing games    D. Traveling

7.A. for    B. with    C. at    D. in

8.A. build    B. building    C. to build    D. builds

9.A. food    B. rooms    C. space    D. meat

10.A. Maybe    B. May be    C. May    D. Possible