这个男孩五岁就会骑自行车了 译
问题描述：
这个男孩五岁就会骑自行车了 译
答
the boy could ride bikes at five years old
答
The boy was able to ride a bike when he was five.
答
The boy could ride a bike when he was 5.
答
This boy could ride a bike when he was five.