1 Martin… school when he was 16. (left)
2 ... the film about penguins last night? (Did you watch)
3 Wendy isn't here now - she … to the shops. (has gone)
4 I ... a story - do you want to read it? (have just written)
5 The footbalers … onto the pitch. (have already come)
6 I might buy this CD. ... it? (have you heard)
7 People ... in Athens for thousands of years. (have been living)
3 You ... to the party yesterday. Why? (did not go)