Turn the following questions into the Passive voice .    1. Do scientists do experiments?     2. Is Mary wearing a new skirt at the moment?     3. Where did they leave their bags?     4.  Is the cat chasing the mouse?     5. Have they asked the actress personal questions?     6. Can  Mr  Jones teach English?     7. Are they going to feed the baby?     8. Did Peter find the missing key?     9. Have they sold their house?     10. How did he find the solution to the problem?     11. Why is Peter making dinner today?     12. Can you show me your homework, please?     13. Will they have repaired your car by Tuesday?     14. Were the children playing football when they arrived?   15. How many stamps have you collected?     16. Are mum and dad paying the bill now?     17. Will they give you money for the trip?     18. Did they demolish the old building last week?     19. Has Sheila opened the window?     20. Does your mum do all the housework?