Упр. 100. Раскройте скобки, употребляя глаголы в Past Indefinite или Past Perfect. 1. When I (to come) home, mother already

1. When I came home, my mother had already cooked dinner. 2. When father returned from work, we already had done our homework. 3. When the teacher entered the classroom, the pupils already had opened their books. 4. Kate gave me the book which she had bought the day before. 5. Nick showed the teacher the picture which he had drawn. 6. The boy gave the goats the 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 come yet. 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.