Вставте правильно were/was и если можно объясните как определить куда что ставить? there was a kremlin in the centre of the town but un the eighteenth century its wall and towers (to destroy) by a great fire.in the eighteenth century the town began to grow because the road between st petersburg and moscow build) and the town stood near the road.
1. were destroyed( стена и башни-мн число, поэтому were)
2. were built ( Санкт-Петербург и Москва, мн число, значит, were)
Was- ед число
Were- множественное