8. There is no doubt that…

7. More and more people have come to realize…

6. Many people often ask such question:“… ？ ”

5. It is often said that …

4. It is quite clear than because…

3. Generally speaking…

2. It goes without saying tan…

1. As the proverb says…

24. Different people observes it in different ways.

23. It is not simple to give the reason for this complicated phenomenon…