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have has 的用法

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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