Вот ответы на вопросы составе ! 1) yes, they were. sabre-toother tigers were dangerous animals. 2) yes, they did. the ancient greeks studied maths and astronomy.

1) Were Sabre-toothed tigers dangerous animals? - yes, they were. Sabre-toothed tigers were dangerous animals.

2) Did the ancient Greeks study maths and astronomy? - yes, they did. The ancient Greeks studied maths and astronomy.