Глаголы в скобках поставте в простом прошедшим времени.
1)it (to be) one of the greatest cities in Europe.
2) it s a beautiful city.
3)A lot of toirists visit it.
4)it is very popular.
5)it (to be) one of the richest and most famous cities of Britan.
6)the Vikings (to come) there a thousands years ago.