开篇

　　1) Many nations have been faced with the problem of ...
 

　　2) Recently the problem has been brought into focus.
 

　　3) Recently the phenomenon has become a heated topic.
 

　　4) Recently the issue has aroused great concern among ...
 

　　5) Nowadays there is a growing concern over ...
 

　　6) Never in our history has the idea that ... been so popular.
 

　　7) Faced with ..., quite a few people argue that ...
 

　　8) According to a recent survey, ...
 

　　9) With the rapid development of ..., ...