用括号内所给词的适当形式填空。 1. The more _________ (exercise) you take, the healthier you will be. 2. I think going _________ (run)is the best way to keep fit. 3. This storybook _________ (interest)me very much when I was a little boy. 4. - Hey, Tony. What are you doing over there? - I’m reading a magazine on health and _________ (fit). 5. You must give up _________ (smoke). It’s bad for your health.