Поставить нужное время

Конечно! Давай разберём задание. Нам нужно поставить глаголы в скобках в правильную форму прошедшего времени: Past Simple, Past Continuous, Past Perfect или Past Perfect Continuous.

1. Nick wrote a letter when I came.
2. He was writing a letter for an hour when I entered.
3. Nick had written the letter yesterday and he put it into an envelope before I came.
4. He had been writing the letter for over an hour before I entered.
5. Kate was writing when I came.
6. And I (report) was preparing my report when you entered the room.
7. I had completed my report by that time.
8. It was raining in Italy on Saturday.
9. It had been raining all day yesterday.
10. And when we were in Italy, it rained for several hours.
11. They came 3 times on Friday and (enter) entered an hour later on Monday morning.
12. She had written notes before we arrived.
13. When we had finished dinner, we went to bed.
14. Tom had cleaned the floor by 2 p.m.
15. The boy had been talking for 15 minutes when his father came.
16. They were doing homework when I entered.
17. They had already done his homework by that time.
18. As he was having dinner, mother was playing the piano.
19. When the visitors had come, they had already made supper.
20. They had had supper before they went to bed.

Если будут вопросы или что-то непонятно, дай знать!