Carmen smihd as she watched the tourists get on board the big air-condi-tioned bus.When everyone was on board,Carmen entered and took a small raisedseat beside the driver.Here she could face the passengers as she spoke to them.“Good morning,ladies and gentlemen,”she said over a loudspeaker.“Wel-come to Mexico City.I am Carmen Campos,and I am your guide for this tour of ourbeautiful capital city.Today we are going to see the highlights of both the old and Carmen smihd as she watched the tourists get on board the big air-condieded bus. Everyone was on board, Carmen entered and took a small raisedseat beside the driver. Here she could face the passengers as she spoke to them. “Good morning, ladies and gentlemen, ”she said over a loudspeaker." Wel-come to Mexico City. I am Carmen Campos, and I am your guide for this tour of ourbeautiful capital city. Today we are going to see the highlights of both the old and