A．Global growth is less lopsided than for many years
B．a comparison of economies of the three engines of the global airplane.
C．America"s impact on the world"s economy
D．The three economy"s contribution to the world economy

A．The advantages of online training game have been exploited by many companies to save money.
B．Video games have been used as training tool for the military.
C．Companies tend to use online game as the marketing tool.
D．Online training game will become a major industry in the following years.