A．The use of high technology.B．Being held in a big city in the U. $. A..C．Earning a lot of money by advertising the goods.D．Training all the athletes who were to participate in the game by using computers.
A．The use of high technology.
B．Being held in a big city in the U. $. A..
C．Earning a lot of money by advertising the goods.
D．Training all the athletes who were to participate in the game by using computers.