2 Fill in: key, recipe, physical, balanced, treat, junk, habits. My friend Katie is such a health nut! She goes jogging every day, and keeps to a 1) ______ diet. She says the 2) ______ to a healthy lifestyle is eating well and exercising regularly. But Katie thinks I don't get enough 3) ______ activity because I prefer watching TV to exercising. She says my lifestyle is a(n) 4) ______ for disaster and that I need to make some changes. Well, I agree that my eating 5) ______ may not be the best but I could never do what she does. Avoid all 6) ______ food? No, thanks! I think it's important to 7) ______ yourself once in a while! But I see what she means about exercise. So I think I will make some changes in