完形填空。
Life in the 21st century will be different from that in the 20th century, because many changes      in the new century,        what will the changes be?
First, the population is growing very fast. There        more and more people in the world and most of them will live longer than before. Computers will be        smaller and more useful, and there will be        one in every home. And computer studies will be one of the most important        in schools.
Second, people will work fewer hours than they did in the 20th century, and they’ll have more free time for sports,        TV and traveling. Traveling will be even cheaper and easier. And more people will go to       countries for holidays.
Third, there will be changes in our food, too. People will use more land        new towns and houses. Then there will be less room for cows and sheep, so meat will be more expensive. Maybe no one will eat it every day, instead, they will eat more vegetables and fruit. Maybe people will be healthier.
Last, work in the future will be       , too. Robots will do the dangerous and hard work. Because of this, many people won’t have enough work to do. This will be a problem.
A.take place        B. will happen   C. have taken place
A.but           B.and             C. so     
A.will be       B. will have      C. are    
A.very          B. quite          C. much       
A.at least      B. at most            C. more than      
A.classes       B. lessons            C.subjects
A.watch         B. watching          C. seeing
A.another       B. the other          C. other      
A. to build         B. build          C. for build  
A.dangerous     B. difficult          C. different