Ending ? Structure 2: Intro 让步( Admittedly, There is no doubt that …, It is true that..+supporting sentece ) +However 反驳原因一( topic sentence+supporting sentence+examples ) 原因二( topic sentence+supporting sentence+examples ) Ending ? Structure 3: Intro 原因(as detailed as possible) Examples Ending ? History has nothing to tell us. ? It is better for children to grow up in the countryside than in a big city. ? Some people believe that air travel should be restricted because it causes serious pollution and uses up the world's fuel resources. ? History has nothing to tell us. ? It is better for children to grow up in the countryside than in a big city. ? Some people believe that air travel should be restricted because it causes serious pollution and uses up the world's fuel resources.