She ____ the piano since she was a child.a.played b.has played c.have played d.had played 选那个?
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. has played
since she was a child 时间状语标志用现在完成时，所以选b
答
选B
since加一个一般过去时的表达，主句要用现在完成时。这是个规律。
she是第三人陈，所以用has不用have
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.