27. I have received 20 cards so far

20 cards have been received so far
28. My farther has just cleaned this motorbike

this motorbike has just been cleaned by my father
29. I have never eaten that cake before

that cake has never been eaten by me before
30. We have just finished the report

the report has just been finished
31. She hasn't answered my letter yet

my letter hasn't been answered by her yet
32. Someone has wound the clock

the clock has been wound
33. A dog has just bitten me

I have just been bitten by the dog
34. Have you ever watched that fỉlm

has that film ever been watched by you?
35. She hasn't seen that man yet

that man hasn't been seen by her yet
36. One of the parents is taping the children's song

the children's song is being taped by one of the parents
37. Is a student pilot flying that airplane?

is that airplane flied by a student pilot?
38. Noone has talked for me that work

i haven't been talked about that work
39. They can think that it will rain tomorrow

it can be thought that it will rain tomorrow
40. Someone has already told him to report to the hedmaster tomorrow

he has already been told to report to the hedmaster tomorrow