The woman in the blue skirt is my mother.对“in the blue skirt ”进行划线提问,怎么变?

问题描述:

The woman in the blue skirt is my mother.对“in the blue skirt ”进行划线提问,怎么变?

WHAT COLOR SKIRT IS YOUR MOTHER IN?

in the blue skirt是定语,起限定作用.
用Which提问
Which woman is your mother?