Put the verbs in bracketsinto the past simple, past continuous, past perfect or past perfect continuous
1. Sam........(read) a book when I went to his office, so I interrupted him.
2. We didn't talk to Bill at school , because when we got there he...........(already/go) home.
3. John............(try) to fix his computer for two hours before he decided to call a professional
4. Ann.........(not/win) the Young Inventor of the Year Award last year, but she's sure she will this year.