Change the sentences from Active Voice to Passive.
11. the lecturer has just given the lecture.
12. the housewife is sweeping the floor now.
13. the sailors had crossed the equator.
14. they will have solved the equations.
15. the moters forgave the children.
16. the workers destroyed the house in 1998.
17. they locked the door after leaving.
18. she is watching an interesting film.
19. the children are drawing the puctures at the moment.
20. They will repair the computer next week.