选择正确的单词完成问句.
when,how,who,whoes,how old,how many,how much,what
1.mum,do you know _____ we love you?
2._____ library card is this?it's peter's.
3._____ pupils are there in your class?forty-right.
4._____ is mary's birthday?it's on children's day.
5._____ is your cousin?he's twelve.