2. Mark ______ (play) in his room while his father ______ (read) the newspaper.

Решение:

Здесь описывается одновременное действие в прошлом. Пока отец читал газету, Марк играл в комнате. Используем Past Continuous для обоих действий.

Mark was playing in his room while his father was reading the newspaper.

Ответ: was playing; was reading