1. The teacher always welcomes new students
=> New students are always welcomed by the teacher
2. People speak English all over the world.
=> English is spoken all over the world
3. Thomas Edison invented the phonograph in 1877
=> the phonograph was invented in 1877 by Thomas Edison
4. The police found two children in thw forest
=> Two children were found in the forest by the police
5. They will send your oder as soon as possible
=> your order will be sent as soon as possible
6. The scientists are studying the problem carefully
=> the problem is being studied carefully
7. Pat Murphy was riding the robbers
=> the robbers were being ridden by Pat Murphy
8. The police have just arrested the robbers
=> the robbers have just been arrested by the police
9. Sue told us she had born her baby
=> we were told that her baby was born
10. They can use this room after 5p.m
=> this room can be used after 5p.m
11. They are cutting the cake with a sharp knife
=> the cake is being cut with a sharp knife
12. The children looked at the animals with strange eyes
=> the animals were looked at by the children with strange eyes
13. They have provided the victim with food and clothing
=> the victim has been provided with food and clothing
14. People speak English every where in the world
=> english is spoken every where in the world
15. You must give this machine back before 5:30 p.m
=> this machine must be given back before 5.30pm