I ... to Belarus with Belavia air company. It ... great! The camp ... on July 3. Every day we ... at seven o'clock and ... in the lake. The weather ... wonderful and the water in the lake... very warm. Then we usually ... breakfast. We ... so hungry after swimming! After that we sometimes ... hiking, ... time playing board games, ... sports or ... on a trip. I saw many beautiful places in Belarus. In the evenings we often ... by the camp fire and ... songs in different languages. Boys and girls from different countries ... each other about their countries. I ... a lot of photos in the camp.

Ниже полный ответ: заполненный текст и подробное объяснение по каждому пропуску. Готовый текст: I flew to Belarus with Belavia airline. It was great! The camp started on July 3. Every day we woke up at seven o'clock and swam in the lake. The weather was wonderful and the water in the lake was very warm. Then we usually had breakfast. We were so hungry after swimming! After that we sometimes went hiking, spent time playing board games, played sports or went on a trip. I saw many beautiful places in Belarus. In the evenings we often sat by the campfire and sang songs in different languages. Boys and girls from different countries talked to each other about their countries. I took a lot of photos in the camp. Пояснения по каждому пропуску (пошагово): 1) I flew to Belarus with Belavia airline. - Выбор глагола: прошедшее время одного действия в прошлом. - Образование: flew — простое прошедшее от fly. - Контекст: путешествие в прошлом. 2) It was great! - It = лагерь/опыт, describing состояние. - to be в прошедшем времени: was (для единственного числа). 3) The camp started on July 3. - Started — простое прошедшее от start. - Указывает на начало лагеря в конкретную дату. 4) Every day we woke up at seven o'clock and swam in the lake. - woke up: простое прошедшее от wake up. Используется для описания ежедневной рутины в прошлом. - swam: простое прошедшее от swim. Описывает регулярное действие. 5) The weather was wonderful and the water in the lake was very warm. - оба предложения в прошедшем времени, описывают состояние в прошлом. 6) Then we usually had breakfast. - had — простое прошедшее от have. - usually указывает на повторяющееся действие в прошлом. 7) We were so hungry after swimming! - were — прошедшее от be. - after swimming — деепричастный оборот, означает «после плавания». 8) After that we sometimes went hiking, spent time playing board games, played sports or went on a trip. - went hiking: went (прошедшее от go) + hiking (существительное/герундий как тип активности). - spent time playing board games: выражение «spend time» в прошедшем времени; playing board games = деепричастие/герундий, обозначающее действие. - played sports: прошедшее от play. - went on a trip: went (прошедшее) + on a trip (предлог + существительное «путешествие»). - Все глаголы в едином прошедшем времени для последовательности действий в прошлом. 9) I saw many beautiful places in Belarus. - saw — простое прошедшее от see. Описывает увиденное в прошлом. 10) In the evenings we often sat by the campfire and sang songs in different languages. - sat by the campfire: sat — прошедшее от sit; campfire чаще пишут слитно как campfire (однако camp fire тоже встречается). - sang — простое прошедшее от sing. - often — обычная повторяемость в прошлом. 11) Boys and girls from different countries talked to each other about their countries. - talked — прошедшее от talk. - to each other — стандартное сочетание «помогает выражению общения»; about their countries — уточнение темы. 12) I took a lot of photos in the camp. - took — простое прошедшее от take. - "a lot of photos" — естественное выражение количества фотографий. Дополнительные заметки и альтернативы (на выбор учащегося): - I went to Belarus with Belavia airline. (вариант: если хотите использовать более нейтральное “went” вместо “flew”) - The camp began on July 3. (начало лагеря можно заменить на “began”) - We usually had breakfast. / We would have breakfast. (варианты стильности) - After that we sometimes hiked, spent time playing board games, played sports or went on a trip. (hiked — альтернативная краткая форма “went hiking”) Если хочешь, могу дать ещё несколько вариантов заполнения пропусков в разных временах (например, чтобы показать разницу между простым Past и Past Continuous) или адаптировать объяснение под другой уровень сложности.