Open the brackets. Put the verbs into right form.1. Secretary (send)

Open the brackets. Put the verbs into right form.
1. Secretary (send) all letters by the time her boss came to work.
2. Bill (work) as a sales assistant for five years before he became an actor.
3. While Tony (play) comuter games, his sister was listening to music.
4. The girls (watch) TV when their mum came home.
5. He (begin) writing stories last year.
6. Tom was very tired. He (had been playing/had played) footbal for hours.
7. Susan was very happy because she (won/had won) the first prize.