27  He will correct the mistakes.
--> The mistakes will be corrected.
28. I have got a beautiful present .
--> A beautiful present has been got
30. I am playing the piano now.
--> The piano is being played.
29.  The cat dropped the vase yesterday.
--> The vase was dropped yesterday by the cat.
31. He has turned off the TV set.
-->The TV set has been turned off.
33. An ice-cream is being eaten by Nick now
32.A mails is received every day
34 Her friend will be lent money
35 Paris is visited evey year 
36 The report has already been prepared.