18. Faced with…, quite a few people argue that…, but other people conceive differently.

17. There is a general discussion today about the issue of …

16. Now people in growing number are coming to realize that…

15. Currently there is a widespread concern that…

14. Now it is commonly held that… but I doubt whether…

13. In the past several years there has been…

12. Recently the issue of… has been brought to public attention.

11. One great man said that…

10. These days we are often told that, but is this really the case?

9. Some people believe that…