past simple or past perfect 1. When I (come) home, mother

Past simple or past perfect
1. When I (come) home, mother already (cook) dinner
2. When father (return) from work, we already (do) our homework
4 Nick (show) the teacher the picture which he (draw)
4. Mother (see) that I (not wash) his hands
5. Tom (return) from the cinema at 5 o'clock
6. Tom (return) from the cinema by 5 o'clock
7 He (think) that he (lose) the money
8. Nick (think) that his father (not yet come) home
9. Yesterday I (find) the book which I (lose) in summer
10. When we (come) to the station, the train already (leave)

помогите, прошу!! но если не понимаете - ре пишите