Put the verbs in the past simple and the past perfect.PAST SIMPLE-PAST PERFECT:
1.When they...(arrive)at the cinema,the film...(begin) already.
2 When she... (come) to the station,the train... (leave) already.
3 They girl... (do) her homework before she... (go) to the park.
4 Tim ...(do) already his work when his mother... (phone) him.
5 We... (be) very pleased to see Alice again.We... not (see) her for three years.
6 Mike... (play) polo yesterday, he... (play) never play polo before.