The mirror on the wall is hers.(对hers提问)
Whose is the mirror on the wall?
It was February 20th yesterday?(对February 20th 提问)
What date was it yesterday
也可以说What was the date yesterday
The mirror on the wall is hers.(对hers提问)
Whose is the mirror on the wall?
It was February 20th yesterday?(对February 20th 提问)
What date was it yesterday
也可以说What was the date yesterday