Although computers can enhance people’s ability to communicate, computer games are a cause of underdeveloped communication skills in children. After-school hours spent playing computer games are hours not spent talking with people. Therefore, children who spend all their spare time playing these games have less experience in interpersonal communication than other children have.
The argument depends on which of the following assumptions?
A Passive activities such as watching television and listening to music do not hinder the development of communication skills in children.
B Most children have other opportunities, in addition to after-school hours, in which they can choose whether to play computer games or to interact with other people.
取反：除了spare，没有机会选择玩游戏和聊天
C Children who do not spend all of their afterschool hours playing computer games spend at least some of that time talking with other people.
取反：其他小孩一点时间都不花在跟被人聊天上
D Formal instruction contributes little or nothing to children’s acquisition of communication skills. 正式交流
E The mental skills developed through playing computer games do not contribute significantly to children’s intellectual development. 跟智力能力无关
答案：c
用来打游戏的spare time 不跟别人说话——spare time用来打游戏的孩子比其他孩子（sparetime不用来打游戏的）交流少
gap1：spare time不是全部time，说不定上课比其他孩子说得多
gap2：不玩游戏的其他孩子就会交流了吗