We are living in an age many things are done on computer.A. whichB. thatC. whoseD. when

问题补充：

We are living in an age many things are done on computer.

A. which

B. that

C. whose

D. when

答案：

A. which

B. that

C. whose

(答案→)D. when

解析：通过分析句子结构，可知这个句子中包含一个定语从句，且关系词在从句中作时间状语，故用关系副词when。