改下下面的句子吧(英语来的)

问题描述:

改下下面的句子吧(英语来的)
1、Today is my father's dirthday.改一般疑问句
2、His grandma is seventy year old.用how old就seventy year old提问
3、Those are Janet's birthday cards.用whose就 Janet's 提问
4、The old woman is Jack's grandmother.用who就Jack's grandmother提问

What is the day today?
How old is his grandma?
Whose cards are those?
Who is Jack's grandmother?