____(She/I)is Tom\'s

____(She/I)is Tom\'s
____(She/I)is Tom\'s

____(She/I)is Tom\'s
选she,可根据句中的is得知
she是第三人称,系动词用is
I是第一人称,系动词用am
you是第二人称,系动词用are
这都是固定搭配

She is Tom's aunt.
I am Tom's aunt.

she 是第三人称用 is
I 是第一人称用 am

She is Tom's aunt.