Ответ:
Перевод задания: Исправь ошибки и перепиши текст.
Last year we used to go on long journeys every month. We used to explore new forests and discover hidden caves. But we didn’t use to swim in the cold river. As soon as we reached the huge rock, we hid behind it. When the storm started, we waited until it finished. Then we saw a broken raft on the shore. It was an amazing adventure!
После didn’t употребляется use to; для законченных событий в прошлом нужны формы Past Simple: hid, finished, saw, was. Устойчивое сочетание — as soon as.
