помогит.. Use the verb in brackets in the past perfect simple

Помогит.. Use the verb in brackets in the past perfect simple or the past perfect passive to complete the sentenses. 2)By the time I got to the party she ...... already(go) home. 3)I opened my wallet and found that I ......(left) all my money at home. 4)The police discovered the letter....(write) two days before the murder. 5) When we got to the cinema we found that all the tickets ..... (sell) so we went back home again. 6) After five minutes I realised I...... (see) the film before.