21.   The main mode of transmission of the virus is by intravenous dadah use.

22.   Trains are the main mode of long-distance travel for the majority of Chinese, who cannot afford plane tickets and do not own cars.

23.   Trains are the main mode of long-distance travel in China.

24.   Thousands of bicycle rickshaws, the main mode of public transportation, jammed the streets for the first time in days.

25.   Typical of organized crime in South Africa is the minibus taxi industry, the main mode of transportation for poor blacks.

26.   Four teams have been formed in Gabon to handle treatment of the virus, whose main mode of transmission is contact with contaminated blood and bodily fluid secretions.

27.   Inter-island ferries, many of them rickety, poorly-maintained and often-overloaded, are a main mode of transportation in this archipelagic nation.

28.   Inter-island ferries, many of them rickety, poorly-maintained and often-overloaded, are the main mode of transportation in this archipelagic nation.

29.   Buses and trucks, which are the main mode of transport in Vietnam, are for the most part badly maintained and overloaded.

30.   Cable networks are turning out to be the main modes of diversification for Japanese trading giants.