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

问题补充：

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

A. which

B. that

C. whose

D. when

答案：

A. which

B. that

C. whose

(答案→)D. when

解析：句意：我们生活在这样一个时代，许多事情都是在电脑上做的。这是定语从句，先行词是in an age，指的是时间，when在定语从句做时间状语，故选D。