1. When I (came) home, mother had already ( cooked) dinner.
2 When father (returned) from work, we had already (tdonee) our homework.
3. When the teacher (entered) the classroom, tbe pupils had already (opened) their books.
4. Kate (gave) me tbe book which she (had bought) the day before.
5. Nick (showed) her the picture which he (had drawn).
6. The boy (gave) the goats tbe grass which he (had brought) from the field.
7. Mother (saw) that Nick (had not  washed) his hands.
8. The teacher (understood) that Lena (had not done) her home­work.
9. I ( knew) that my friend (had not yet come).
10. Tom (returned) from the cinema at 5 o'clock.
11. Tom (had returned) from the cinema by 5 o'clock.
12. I (finished) my homework at 7 o'clock.
13. I (had finish) my homework by