11. 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.
无可否认，空气污染是一个极其严重的问题：城市当局应该采取有力措施来解决它。
12. An investigation shows that female workers tend to have a favorable attitude toward retirement.外语学习网
一项调查显示妇女欢迎退休。
12a. A proper part-time job does not occupy students' too much time. In fact, it is unhealthy for them to spend all of time on their study. As an old saying goes: All work and no play makes Jack a dull boy.
一份适当的业余工作并不会占用学生太多的时间，事实上，把全部的时间都用到学习上并不健康，正如那句老话：只工作，不玩耍，聪明的孩子会变傻。
14. Any government, which is blind to this point, may pay a heavy price.
任何政府忽视这一点都将付出巨大的代价。
15.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.
当前，一提到即将开始的学校生活，许多学生都会兴高采烈。然而，对多数年轻人来说，校园刚开始的日子并不是什么愉快的经历。
