11.  Bombs have become a common means of resolving trade disputes since Bulgaria began to move towards a market economy.

12.  Civilian aircraft is the most common means to send cocaine base from Peru to Colombia for final processing and for ultimate distribution in the United States.

13.  Combis quickly became the most common means of public transportation.

14.  Experts caution that this is still a common means of transmission.

15.  He said prostitution and intravenous drug abuse are the most common means of spreading the disease in the region.

16.  Helicopters are a common means of transportation in the Russian far north, where roads are few and often flooded at this time of year during the spring thaw.

17.  In fact, a dongle is quite a common means of protecting intellectual property rights.

18.  Sea travel is a common means of transport in this poor, mountainous nation on the Caribbean island of Hispaniola.

19.  The group said prostitution and intravenous drug abuse are the most common means of spreading the disease in the region.

20.  The most common means of transport are rudimentary boats and many sink along the way.