10: These old pictures won't be hang in the living room (by me)
11: This factory wasn't built by the German during the Second World War
12: This house and this car are going to be painted by the Greens for Chrismas day
13: The cat had been fed by Ann before she went to the cinema
14: The pollution problems have been discussed by the students
15: Has the most valuable painting stolen by the thieves in the national museum?
16: The new present will be interviewed by some people on TV
17: How many language are spoken in Canada?
18: Are those shoes going to be repaired by you?
19: HIs nose has been broken by him in a football match
20: Have the above sentences finished by you?