Помогите пожалуйста(оченьь срочно)

Complete the questions with was there or were there.Then write true answers.
(Пример)
In the last century...
Were there any world wars?
Yes,there were.

1) ... a nuclear bomb?
2) ... any great inventions?
3) ... a Roman invasion?
4) ... any dinosaurs in the world?
5) ... a civil war in Russia?

Заранее спасибо♥♥