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.

1.When I came home, mother had already cooked dinner.2. When father returned from work, we had already done our homework.3. When the teacher entered the classroom, the pupils had already 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 hehad brought from the field.