Translation of ancient in German

Hi,I'd like to ask you if it's possible for you to tell me briefly how to study here. I don't know that's why I'm not online most of the time. Thank you very much for choosing me as a friend. I hope our friendship can get better so we can practice.
We decided to walk back and explore the city on foot. It was hard to cross the streets as there was an endless flow of motorcycles and bikes. One needed to just enter the street and cross it.
We blamed the sandwich which we had eaten a day earlier for lunch in Bolivia for the stomach ache of my wife. She became very weak and she had to stay in the hotel for two entire days.