英语三级B级
A．with
B．in
C．on
D．for
【考点】介词的用法
【解析】in表示时间，指“在某段时间之内”；on表示“某一天或某个具体的日期”；for表示“动作持续的时间”，后面多跟一段时间。本题是指处在计算机时代这一段时间之内，故选B。
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