he( )to play ( )before he was 11 years old A had learned ,the piano B has learned ,the piano
问题描述:
he( )to play ( )before he was 11 years old A had learned ,the piano B has learned ,the piano
答
A had learned ,the piano
因为语句中已经有了过去时间,表现过去的过去,用过去完成时.