【答案解析】Billions of football fans are so excited about the World Cup, a carnival for sports, where star players from 32 top teams gather in Germany to compete hard for Trophy. How would the World Cup affect the world economy? While fans, deep in their excitement of the games on pitch, leave no time for the above questions, the dispassionate economists have got their idea. The World Cup, a commercial event just like the Olympic Games, brings the host country a great fortune. Experts estimate that this World Cup will bring Germany an immediate return of 20 billion USD. It is then easy to understand why Hypercube, a Holland-based consulting firm, proposed that FIFA hold the World Cup every two instead of four years.