original: when south africa became a republic in 1961 , pretoria remained its administrative capital .
simplifications: when south africa became a republic in 1961 , pretoria stayed its administrative capital . when south africa became a republic in 1961 , pretoria remained its administrative capital . when south africa became a republic in 1961 , pretoria stayed as the administrative capital . when south africa became a republic in 1961 , pretoria was still its administrative capital . when south africa became a republic in 1961 , pretoria remained its administrative capital . when south africa became a republic in 1961 , pretoria continued as its administrative capital . when south africa became a republic in 1961 , pretoria stayed as its administrative capital . south africa became a republic in 1961 with pretoria remaining its administrative capital .