Today, many college students are absorbed in playing computer games. Maybe there is some truth in the statement that computer games are fun and will train one's reactivity, determination and attention. However, the merits of computer games can never compensate for the negative effects they have. First, it is very time-consuming to play computer games. The game fans have sacrificed almost all their time，thus they have no time to attend class, to take exercises, or even to date. Upon gradu...