11. Everything has two sides and ______________ is not an exception, it has both advantages and disadvantages.

12. For years ______________ had been viewed as ______________. But people are taking a fresh look at it now.

13. It has stipulated by the government that ______________. To this stipulation, many people respond actively because ______________.

14. ______________ is a common occurrence in our daily life. Whatever we do, ______________ can’t be avoided.

15. ______________ has become a hot topic among people, especially among the young, and heated debates are right on their way.

16. Recently, ______________ has become the focus of the society, and in this way.. People swarm to ______________.

17. ______________ has been playing an increasingly important role in our day-to-day life. It has brought us a lot of benefits but created some serious problems as well.

18. Man is now facing a big problem-______________, which is becoming more and more serious. First, ______________ second, ______________.

19. Nowadays more and more people are beginning to be aware of the seriousness of ______________.

20. It is only during the last years that man has become generally aware that ______________.