have has 的用法

have has 的用法
1、How long ___you and your husband to been married?
a has b have
2、How long ___your son played the violin?
a has b have

you and your husband （你和你丈夫）两个人,所以是复数,用 have.
your son （你的儿子）一个人,单数第三人称,用 has
所以：
B
A