Mr. Grey was the manager of a small office in London. He lived in the country, and came up to work by train. He liked walking from the station to his office unless it was raining, because it gave him some exercise. One morning he was walking along the street when a stranger stopped him and said to him, "You may not remember me, sir, but seven years ago I came to London without a penny in my pockets, I stopped you in this street and asked you to lend me some money, and you lent me PS 5, because you said you were willing to _ so as to give a man a start on the way to success." Mr. Grey thought for a few minutes and then said, "Yes, I remember you. Go on with your story!" "Well," answered the stranger, "are you still willing to take a chance?" Mr. Grey liked walking to his office because   _  .
he couldn't afford the buses he wanted to save money he wanted to keep in good health he could do some work on the way