Change the following sentences to passive by filling in the correct verb forms

Change the following sentences to passive by filling in the correct verb forms !

1. The secretary opens the mail every morning.
   The mail  .........by the secretary every morning.
2. A gardener is watering the flowers.
   The flowers.............  by a gardener.
3. Jimmy walks the dogs every day.
   The dogs...........  by Jimmy every day.
4. Heavy rain had caused the flood.
   The flood  ............by heavy rain.
5. Police officers were examining the evidence.
   The evidence ............ by police officers.
6. A spokesman gave an interview to the reporters.
   The reporters..............  an interview by a spokesperson.
7. A guide will take you to your seat.
   You .......... to your seat by a guide.
8. We are going to announce the results on Friday.
   The results ......... on Friday.
9. The new manager has made some changes.
   Some changes ............ by the new manager.
10. The students are making arrangements for the party.
    Arrangements ............ for the party.
11. They clean the windows every week.
    The windows ............ every week.
12. They had invited him to the cinema.
    He ................ to the cinema.