Question

My mother is at home.(对画线部分提问)

Answer 1

1、where is your mother?

2、who is at home?
3、what's your mother doing?

Answer 2

Where is your mother?

追答

以上是对at home 划线。

如果划在my mother上，那就应该是：
Who is at home?

认真答题，确保正确，欢迎追问，放心采纳。