Most people agree that the lack of exercise in teenagers' lives is a serious problem. But (7) and what can we do to address them? I strongly believe that today's teenagers spend too much time playing on electronic gadgets. They hardly ever do outdoor activities and this is why (8) do not get enough exercise. What is more, many teenagers are overweight and (9). In order to tackle this problem, a number of measures are necessary. In my view, it is unrealistic to limit (10) on gadgets. What I propose instead is that we make sure school canteens only serve healthy food. Furthermore, I would strongly recommend that (11) free membership of their local sports facilities. To conclude, lack of exercise can cause long-term health problems, so it is vital that we act now. It seems to me that the measures I propose will begin (12).