Find and correct five mistakes with articles in the text.
We went to Edinburgh to visit my aunt and uncle last August. Edinburgh is the big city in Scotland. While we were there, we visited the castle. It is oldest building in the city. We also went to some museums. There is a big hill in Edinburgh called Arthur’s Seat and we climbed to the top. We had a great view of a city. Every August there is a festival with lots of plays and street theatre and I saw a opera for the first time. The streets were filled with the people all day. It was fantastic!