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    Task1-pie charts

    Task2：

    版本1：Because of economic growth, people become richer. However, studies show that people become happier than before in developing countries while people are unhappier than before in developed countries. What are the causes and what lessons we can learn from this.

    版本2：The people in developing countries feel happier when they get richer while the people in developed countries do not feel the same. Why you think it is and what lessons could you learn from it.

    版本3：People in both developed countries and developing countries are richer for economic growth. Studies show people in developing countries are happier than before while people in developed countries are not. Analyze reasons and what can we learn?