Write these sentences in the passive. 1. she doesn't invite me to her dinner parties. 2. the teacher sent for the pupil's parents. 3. i don't think they will have done this work by the end of the week. 4. will snow cover the fields in winter? 5. they are building a bridge over the river now. 6. nobody slept in the bed. 7. the pupils always laugh at this boy. 8. "has the secretary typed the letters? " "no, she is typing them now." 9. when i came home they had eaten the sweets. 10. the children were playing tennis from four till five. 11. everybody listened to the teacher with great attention. 12. do they sell milk in this shop? 13. we shall not insist on strict discipline. 14. by 6 o'clock he had finished the composition. 15. we were looking at the teacher with great surprise. 16. they haven't told her the truth. 17. the students are translating this article now. 18. she looks after the patients well. 19. they did not wait for me. 20. we shall finish this work in time.