Bob and Jim once worked in the same factory. ...

Bob and Jim used to work in the same factory. One day, Bob lent Jim 10 yuan, but later Jim went to work in another town and didn't have time to return the money to Bob.

Bob waited for Jim for a year. At this time, he learned from another friend that Jim was staying in a hotel in another town. So he went there all night to meet Jim.

When he came to the door, he saw Jim's shoes outside. "Well, he must be in there," he said to himself. He knocked at the door, but no one answered. He knocked on the door again and said, "Jim, I know you're inside and your shoes are outside."