1. There is no denying the fact that air pollution is an extremely serious problem：the city authorities should take strong measures to deal with it.
2. An investigation shows that female workers tend to have a favorable attitude toward retirement.
4. Any government，which is blind to this point，may pay a heavy price.
5.Nowadays，many students always go into raptures at the mere mention of the coming life of high school or college they will begin. Unfortunately，for most young people，it is not pleasant experience on their first day on campus.
7. The majority of students believe that part-time job will provide them with more opportunities to develop their interpersonal skills，which may put them in a favorable position in the future job markets.
8. It is indisputable that there are millions of people who still have a miserable life and have to face the dangers of starvation and exposure.
10. No one can deny the fact that a person’s education is the most important aspect of his life.