Peter (stop) when he felt somebody’s hand in his pocket.
18. we overslept and when at last we arrived at the station, our train (leave) already.
19. she (read) a book for 3 hours yesterday. 20. he (not come) to us yesterday, but we hope he will come today.
21. i (wait) at the theatre for an hour before ann finally showed up.

17. Peter stopped when he felt somebody’s hand in his pocket. Питер остановился, когда почувствовал чью-то руку в своем кармане.

18. We overslept and when at last we arrived at the station, our train had already left. Мы проспали, и когда мы наконец прибыли на станцию, наш поезд уже уехал.

19. She was reading a book for 3 hours yesterday. Вчера она читала книгу на протяжении трех часов.

20. He did not come to us yesterday, but we hope he will come today. Он не пришел к нам вчера, но мы надеемся, что он придет сегодня.

21. I had been waiting at the theatre for an hour before Ann finally showed up. Я ждал в театре на протяжении часа, прежде чем Энн наконец появилась.