1) Ronald is a good sportsmen. He always keeps regular hours.
2) It is an easy question. I can answer it now.
3) Jane always eats healthy food, she thinks it is very useful for her.
4) Alex is good at swimming. He is a good swimmer.
5) I couldn't do it. It was very difficult.
6) It is very good to know English.
7) It is good to keep fit.