Most people sleep at night, but Frank sleeps during the day and works at night. His work is to guard (看守) a large factory. He is lonely because nobody there talks with him in the evening.
Frank likes his work. He knows that it is important to guard the factory at night. If he hears any noise, he goes quickly to see what it is. Most of the time he walks around inside the big building, but he also walks around outside. When he is tired, he can sit on a chair by the door. It is very cold in winter. He always wears a warm coat when he is working.
One night when Frank went outside, he heard a noise near a dark corner of the factory. He went very quietly towards the noise to see if someone was there, but he only saw a small dog. Frank smiled and talked to the dog. It looked cold and sad. He took the dog inside the building, and the happy dog followed him around. During the rest of the night Frank was not lonely. A dog was a good friend for him.
