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)