Поставьте в форму past simple или past continuous

Конечно, давай разберём задание вместе! Нужно поставить глаголы в правильную форму Past Simple или Past Continuous. Вот как это сделать:

1. They were drinking tea when I came home.
2. He was walking along the river when a boat passed.
3. The old man was thinking about his plan when he fell asleep.
4. We were listening to an interesting lecture yesterday.
5. When I entered the classroom, the teacher was writing words on the blackboard and the pupils were copying them into their exercise-books.
6. They were getting ready to go out when it began raining.
7. Yesterday at one o'clock I was having lunch at the canteen.
8. When you came in, I was doing my exercises.
9. What were you doing at eight o'clock yesterday?
10. At this time yesterday I was going home.

Если есть вопросы или что-то непонятно, не стесняйся спрашивать!