1.This flower is watered (by my father) every morning. 2.Fiona was invented to John’s birthday party last month. 3.The dinner is being prepared (by her mother) in the kitchen. 4.Our teeth should be cleaned twice a day. 5.The English grammar has been explained (by our teacher). 6.The accident was caused in this city (by some drunk drivers). 7.Tom’s parents will be visited (by him) next month. 8.The secretary wasn’t phoned (by the manager) this morning. 9.Was this beautiful dress bought by Mary? 10.These old pictures won’t be hung in the living room(by me). 11.This factory wasn’t built (by the Greens) during the Second World War. 12.This house and these cars are going to be painted for Christmas day by the Greens. 13.The cats had been fed (by Ann) before she went to the cinema. 14.The pollution problems have been discussed (by the students) since last week. 15.Has the most valuable painting in the national museum been stolen (by the thieves).