11.  Effective writing plays an important role in a college student's success.

12.  Exercise should play a very large role in daily life.

13.  And bicycle are playing an important role in China.

14.  Our country has played a more and more important role in international affairs.

15.  First, it breaks the role of things.

16.  One way, we can pass the role of rice's growing by and drop it up when we fell until grows too slowly .

17.  So, when we do a thing, we should respect the role of things.

18.  Comporatoary days, efficience plays essential role in competitive cases , which people crazily persue .

19.  Second, the govenment should play an important role in investigating such business.

20.  As we know, the fake commodities have played a very bad role in the social .