4. P___ you ___ (eat) fish and chips when you were in London?

Решение:

Это вопрос в Past Continuous. Используем 'was/were' + глагол с окончанием '-ing'.

Местоимение 'you' требует вспомогательного глагола 'were'.

Глагол 'eat' в форме Continuous будет 'eating'.

Собираем вопрос: Were you eating fish and chips when you were in London?

Ответ: Were you eating