1.Bingham found amazing things in Machu Picchu, didn`t he?
2.He found stone buildings there, didn`t he?
3.Hiram Bingham was a scientist, wasn`t he?
4.He isn’t American, is he?
5.Farmers constructed terraced fields around the city, didn`t they?
6.All the buildings were not strong, were they?
7.Even earthquakes didn't destroy them, did they?
8.The Incas were smart people, weren`t they?
9.They were not only great builders and astronomers, were they?
10.Machi Picchu was a great city, wasn`t it?
11.Hundreds of people lived there, didn`t they?