Выберите правильный вариант ответа. My family and i ( are taking part in/ have taken part in) a 10 mile stroll around

My family and I have taken part in a 10 mile stroll around London today. My dad and I were strolling around London from 9 am to 3 pm. We had to check three times during the stroll. The atmosphere was fun. There were a lot of people, some people were wearing fancy dress. Cadbury people were giving out free chocolates. While we were strolling we visited some great sights of London. At the finish I got a prize. It is one of the most exciting days out I have ever had.