1 Were Sabre-toothed tigers dangerous animals?
2 Did the ancient Greeks study maths and astronomy?
3 Did Alexander the Great live about 2,300 years ago?
4 Was Peter the Great about 2 methes tall?
5 Did Boys in ancient Sparta swim in the icy river.
Вопрос должен начинаться с Did? - Здесь они намудрили: При ответе Yes, he was вопрос не может начинаться с Did.