Сколько двузначных чисел можно составить из цифр 1,5,7,9 если цифры в числе не повторяются

1    Express the same idea in a different way.

Model: I was sent a letter. — A letter was sent to me.

1.    Mother was promised a holiday.
2.    Kate is being shown a new flat now.
3.    We have already been shown this film.
4.    Granny will be offered a ticket to the theatre.
5.    I was told a joke.
6.    Rob was sent a note.
7.    Some food was left for her.