T1：pie chart
1987年和2007年学生选择英国大学的理由，一共5个理由分别在1987占35%,21%,19%,15%,10%，到了2007分别为：37%,17%,6%,18%,22%
T2: 年轻人越来越富有、健康和安全却越来越不快乐，说明理由并给出解决方案。
回忆4：
Writing1: five different reasons for students to choose a particular university in Uk. Pie Chart!!!
Writing2:in some countries, children become richer, safer and healthier. But they are not happy. Causes and solutions.
