管理员今天推荐了好多错误答案.怎么回事?
when是错的.正确的是that或which,正如楼主所说.楼上怎么能连题目都不看清楚就乱答呢?
回答楼主的问题如下.如果你把语序略微变一下,就清楚了：
We are living in the age about which we have a lot of things to learn.
这是个定语从句,用来修饰the age.从句说的是we have a lot of things to learn about the age.which替代the age作介词about的宾语.