Срочно !!!Помогите пожалуйста номер 8 с действительным и страдательным залогами

1 The meeting was held last Saturday2 They were photographed yesterday afternoon3 He was hit by car in High Street last night4 Mary was introduced to professor Black last Monday5 Bill and Ann weren't invited to Mary's party 6 Tom's car wasn't polished last month7 Bill's dog wasn't fed untill 7 p.m. 8 New gate wasn't finished yesterday9 Was the library closed exactly at 9 o'clock last week?10 Is it true that they were photographed yesterday afternoon?11 Was the new gate fixed yesterday?12 Were you introduced to Mr Brown in the meeting yesterday night?13 Weren't there dances last Saturday night?14 Why wasn't new gate fixed yesterday morning?15 Tom was promoted in the office last week, wasn't he?16 I was introduced to your friend last month, wasn't I?17 You were invited to Mary's party, weren't you? 18 This programm wasn't put on last week, was it?