When Mozart was five years old,he could play the violin.(改为同义句)

问题描述:

When Mozart was five years old,he could play the violin.(改为同义句)
When Mozart was five years old,he_______ ________ _______play the violin.

很高兴能够在这里回答你的问题,应该为:
When Mozart was five years old,he (was able to)play the violin.
can=be able to