Срочно, помогите! 99 баллов

1 came-had already cooked
2 returned -had already done
3 entered -had already opened
4 gave-had bought
5 showed-had drawn
6 gave-had brought
7 saw-hadnt washed
8 understood-hadnt done
9 knew-hadnt come yet
10 returned
11 had returned
12 finished
13 had finished

10 didnt go-will go
11 where was Kate going when you met..?
13enters
13 entered
14 when will the secretary come
15 were listening
16 entered -was typing
20 rang me up

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 he had brought from the field.
7. Mother saw that Nick hadn't washed his hands.
8. The teacher understood that Lena hadn't done her homework.
9. I knew that my friend hadn't 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.
13. I had finished my homework by 7 o'clock.
10. I didn't go to the shop yesterday. I will go to the shop tomorrow.
11. Where was Kate going when you met her yesterday?
12. Every day the boss enteres the office at 9 o'clock.
13. Yesterday the boss entered the office at half past nine.
14. When will the secretary come tomorrow?
15. At 6 o'clock yesterday we were listening to a very interesting lecture.
16. When I entered the office, the secretary was typing some letters.
20. My friend rang me up at 8 o'clock yesterday.