Атив в пассив 1) i did this work yesterday 2) i was writing letters at 5 p. m. yesterday 3) nobody has visited the exhibition yet 4) i have already sent for the doctor 5) i will have finished the transaction of this article tomorrow by 2 o'clock

1. This work was done yesterday
2. The letters were being written at 5p.m. yesterday
3. The exhibition hasn't been visited yet
4. (Тут пропущено какое-то слово: не к чему пассив строить)
5. The transcation of this article will have been finished tomorrow by 2 o'clock