задать 4 типа вопросов: разделительный, общий, альтернативный, специальный. к предложению: Britain has for centuries encouraged research and innivationand its record of achievements has been maintained throughout the twentieth century.
Разделительный - Britain has encouraged research and innovation, hasn't it? Общий - What has Britain encouaraged for centuries? Альтернативный - Has Britain encouraged research or art? Специальный - Where have researh and innovation been encouraged for centuries?