Rewrite the sentences in the passive where possible 1) my sister cooked the dinner 2) the thief had wiped the fingerptints before the time when police came 3) my grandmother id making curtains at the moment 4) they invited mary to the party 5) they arrived at the airport early this morning 6) they will open the new library to the public in september 7) they are repairing my car 8) the their stole all the money in the till ,

1.The dinner was cooked by my sister.
2.The fingerprints had been wiped by the thief before the time when police came.
3.Curtains are being made by my grandmother at the moment.
4.Mary was invited to the party.
5.impossible to rewrite
6.The new library will be opened to the public in September.
7.My car is being repaired.
8.All the money was stolen by the thief.