Решение #
2) Charles was swimming while Sam was singing. (Чарльз плавал, пока Сэм пел.)
3) Charles was buying bread while Sam was cooking. (Чарльз покупал хлеб, пока Сэм готовил.)
4) Charles was painting while Sam was walking his dog. (Чарльз рисовал, пока Сэм выгуливал собаку.)
5) Charles was writing while Sam was listening to music. (Чарльз писал, пока Сэм слушал музыку.)
6) Charles was riding a horse while Sam was driving a car. (Чарльз ехал на лошади, пока Сэм водил машину.)
7) Charles was running while Sam was jumping. (Чарльз бегал, пока Сэм прыгал.
8) Charles was watching a film in the cinema while Sam was playing volleyball. (Чарльз смотрел фильм в кинотеатре, пока Сэм играл в волейбол.)