7. When I (walk) into the busy office, the secretaries (talk) on the phone with customers, a clerk (work, busily) at his desk, and two managers (discuss, quietly) methods to improve customer service.

Перевод задания: Дополните предложения правильной формой глагола: Past Simple или Past Continuous.

When I walked into the busy office, the secretaries were talking on the phone with customers, a clerk was working busily at his desk, and two managers were quietly discussing methods to improve customer service.

Перевод: Когда я вошёл в оживлённый офис, секретари разговаривали по телефону с клиентами, служащий усердно работал за своим столом, а два менеджера тихо обсуждали способы улучшить обслуживание клиентов.

Вход в офис — завершённое действие; остальные действия уже происходили в этот момент.