III. Fill in a suitable preposition or postposition.
Mrs. Laura Taylor is a person who really believes ... keeping fit. She is 45 but looks ... least 10 years younger. Now listen ... her story. 'It all started about two years ago.... those days things were very different. I was overweight. I never got any exercise. I used to stay ... home all day. I never went......the fresh air, except to do the shopping. One day I looked ... myself ... the mirror. 'My God' I thought. Т look terrible'. ... that time I've completely changed my life. I started jogging ... the park, doing yoga exercises ... the fitness centre and eating less meat but more vegetables. I've lost weight and feel much healthier than I used to.'