Раскройте скобки, употребляя глаголы в Past Simple или Past perfect

1. When I (to come) home, mother already (to cook) dinner.
2. When father (to return) from work, we already (to do) our homework.
3. When the teacher (to enter) the classroom, the pupils already (to open) their books.
4. Kate (to give) me the book which she (to buy) the day before.
5. Nick (to show) the teacher the picture which he (to draw).
6. The boy (to give) the goats the grass which he (to bring) from the field.
7. Mother (to see) that Nick (not to wash) his hands.
8. The teacher (to understand) that Lena (not to do) her homework.
9. I (to know) that my friend (not yet to come).
10. Tom (to return) from the cinema at five o'clock.
11. Tom (to return) from the cinema by five o'clock.
12. I (to finish) my homework at seven o'clock.
13. I (to finish) my homework by seven o'clock.
14. He (to think) that he (to lose) the money.
15. Ann (to tell) me that she (to see) an interesting film.
16. When I (to wake) up yesterday, father already (to go) to work.
17. Nick (to think) that his father (not yet to come) home.
18. Mary (to tell) us that she (to cook) a good dinner.
19. Yesterday I (to find) the book which I (to lose) in summer.
20. When we (to come) to the station, the train already (to leave)