Помогите срочно номер 8

1) Ronald is a good sportsman. 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 ..Good. for her. 4) Alex is ..Good. at swimming. He is a good swimmer . 5) I couldnt do it .It was very .difficult. .6) It is very ..useful. to know English. 7) It is good to keep .fit. .