I love running. It's a way...(keep) fit.
to keep
I've always enyoyed...(walk).but I didn't use to like running.
walking
Then, after...(buy) some expensive trainers, it felt much easier.
buying
So, if you want...(do) more exercise, I'd recommend running.
to do
Just remember...(invest) in some good running shoes.
to invest
They'll make you...(feel) much better.
feel
