1. Why didn't they help him?
-> Why wasn't he helpped?
2. How long have they waited for the doctor?
-> How long has the doctor been waited for?
3. What time can the boys hand in their papers?
-> What time can their papers be handed in by the boys?
4. Where do people speak English?
-> Where is English spoken?
5. How did the police find the lost man?
-> How was the lost man found by the police?