We are living in an age many things can be done on computers and the Internet.A. whichB.

问题补充：

We are living in an age many things can be done on computers and the Internet.

A. which

B. that

C. whose

D. when

答案：

A. which

B. that

C. whose

(答案→)D. when

解析：本题考查定语从句。when引导定语从句修饰先行词an age，when在从句中作时间状语。句意为“我们生活在一个可以在电脑和互联网上做许多事情的时代”。