¡¡¡¡These days we often hear that (1).It is common that (2). Why does such circumstance occur in spite of social protects? For one thing, (3).For another, (4). What is more, since (5),it is natural that (6).To solve the problem is not easy at all, but is worth trying. We should do something such as (7) to improve he present situation, and I do believe everything will be better in the future.