4. their holiday, Are, they, enjoying?

Предлагаемые слова:

their holiday, Are, they, enjoying?

Решение:

Составляем общий вопрос. Начинаем с вспомогательного глагола 'Are', затем подлежащее 'they', смысловой глагол 'enjoying' и дополнение 'their holiday'.

1. Are they enjoying their holiday?

Ответ: Are they enjoying their holiday?