A. weboholism has the greatest effect on teenagers

　B. students can hardly balance real and virtual life

　C. people are addicted to games on the Internet

　D. virtual life is more vivid and attractive than real life.

3．Which of the following is NOT true of weboholism?

　A. People addicted to the web often become inactive in real life.

　B. The chat room language may change social culture.

　C. The problem will be getting more and more serious later.

　D. It leads to the development of the web.

From self-driving cars to carebots(护理机器人) for elderly people, rapid development in technology has long represented a possible threat to many jobs normally performed by people. But experts now believe that almost 50 percent of occupations existing today will be completely unnecessary by 2025 as artificial(人工的) intelligence continues to change businesses.

"The next fifteen years will see a revolution in how we work, and a revolution will necessarily take place in how we plan and think about workplaces, " said Peter Andrew, Director of Workplace Strategy for CBRE Asia PACIFIC.

A growing number of jobs in the future will require creative intelligence, social skills and the ability to use artificial intelligence.

The report is based on interviews with 200 experts, business leaders and young people from Asia Pacific, Europe and North America. It shows that in the US technology already destroys more jobs than it creates.

But the report states, "Losing occupations does not necessarily mean losing jobs - just changing what people do." Growth in new jobs could occur as much, according to the research.

"The growth of 20 to 40 companies that have the speed and technological know-how will directly challenge big companies," it states.

A 2014 report by Pew Research found 52 percent of experts in artificial intelligence and robotics were optimistic about the future and believed there would still be enough jobs in the next few years. The optimists pictured " a future in which robots do not take the place of more jobs than they create," according to Aaron Smith, the report's co-author.