She ____ the piano since she was a child.
问题描述：
She ____ the piano since she was a child.
a.played b.has played c.have played d.had played 选那个?
答
B 与since 短语连用应该用完成时,所有A错误,短语里用的是过去时,主语应该用现在完成时,所以D错误,主语是第三人称单数,所以C错误.