they're my sisters 变单数形式
问题描述：
they're my sisters 变单数形式
答
She is my sister.
有不明白的地方再问哟，祝你学习进步，更上一层楼！ (*^__^*)
答
SHE IS MY SISTER
答
she is my sister.
答
she is my sister
答
She is my sister.
或：She's my sister.