2. 专升本
  3. We are living in an era________many things are done by computer.

We are living in an era________many things are done by computer.

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问题 We are living in an era________many things are done by computer.
选项 A、what
B、which
C、why
D、when
答案D
解析 分析句子结构可知，空处引导一个定语从句，修饰表示时间的先行词an era，且空处在从句中作时间状语，所以应用关系副词when来引导。what不能引导定语从句；which在定语从句中作主语、宾语或表语；why在定语从句中作原因状语，这三项均不符合题意。故选D。
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