I. they (to meet) at the station two hours ago, 2. where you (to spend) last sunday? 3. we (to be) in a hurry because only twenty minutes (to be) left before the beginning of the performance. 4. i (to play) the violin when my friend (to come) in. he (to invite) me to the theatre and i (to accept) the invitation with pleasure. 5. he (to ring) up his friend and (to ask) him about the homework, 6, when i (to come) to the theatre, my friend al­ready (to wait) for me. 7. last sunday we (to go) sksing in the country. there (to be) already a lot of snow in the fields and we (to enjoy) ourselves. we (to ski) for two hours and a half.

Вот правильные формы глаголов для данных предложений:

1. They met at the station two hours ago.
2. Where did you spend last Sunday?
3. We were in a hurry because only twenty minutes were left before the beginning of the performance.
4. I was playing the violin when my friend came in. He invited me to the theatre and I accepted the invitation with pleasure.
5. He rung (или rang) up his friend and asked him about the homework.
6. When I came to the theatre, my friend was already waiting for me.
7. Last Sunday we went skiing in the country. There was already a lot of snow in the fields and we enjoyed ourselves. We skied (или were skiing) for two hours and a half.