1)I wonder if they had advertised the goods.
Yes, they had.
2)I wonder if they had won a victory over the enemies in the War of Independence
Yes , they had.
3)I wonder if they had made a public show with marches and mettings.
Yes, they had.
4)I wonder if they had sang an old Romanian song.
Yes, they had.
5)I wonder if they had saw the new year in.
Yes ,they had.
6)I wonder if they sent good wishes to our friends.
Yes, they had.