помогите по английскому языку

задание: Put the verbs in brackets into the past simple, past continuous, post perfect or past perfect continuous.

текст:
1) Peter ... ( talk ) on the phone when I went to his office, so I didn't want to interrupt him.
2) We didn't see Jane at the party, because when we got there she ... ( already/go ) home.
3) When ... ( James/graduate) from university?
4) John ... (try) to fix his computer for two hours before he decided to call a professlonal.
5) Sam ... (not/win) the Young Inventor of the Year Award last year, but he's sore he will this year.