Alotofpeopleintheworldtodayareusedtoworking，goingonholiday，andhavingmoney-butmanyofthemaren'thappy．Yetotherpeopleseemtobereallyhappy，（34）___theyarepoor，orhavenojob，oraresurroundedbyproblems．Why

　　A lot of people in the world today are used to working，going on holiday，and having money-but many of them aren't happy．Yet other people seem to be really happy，

　　（34）___ they are poor，or have no job，or are surrounded by problems．Why？

　　Professor Mihaly Csikszentmihalyi，from the University of Chicago，has interviewed thousands of people who have a happy life to find out how they do it．"I（35）___（study） happiness for over 30years，"says Csikszentmihalyi．"My interest in the subject came from my own experience as a child during World War II，when I saw many adults destroyed by the terrible events．But there were always a few who kept their courage，helped others，and were able to give a sense of purpose and meaning to their lives．I wanted to find out how a person（36）___ build a fulfilling and enjoyable life．"

　　In general，his research showed that people were unhappy doing nothing．The professor stresses that happy people don't waste time，either at work or when they're free．"Many people feel the time that they spend at work or at school wasted．But often their free time（37）___ （waste） as well．Many people are used to doing passive things-watching television，for example-without（38）___（use） any skills．As a result，life goes past in a series of boring experiences．"

　　But it doesn't have to be this way．The professor has found that people are happy when they get into （39）___ he calls"flow"．When people get very involved in a task that they have chosen，and which is well-defined and challenging，they experience"flow"，a situation（40）___ they don't notice time passing．

　　People who are not used to happiness can learn how to be happy，says the professor，if they constantly get into"flow"states．Is happiness as easy as that？Perhaps it is．