What goes on four legs in the morning,on two at noon,and on three in the evening?

问题描述:

What goes on four legs in the morning,on two at noon,and on three in the evening?

什么走路开始用四条腿,后来用两条腿,最后用三条腿?
答案是:人

A man
一个人出生不会走路
到了老年又要用拐棍