Mrs Green had a young dog which was very clever. It often helped her buy a newspaper. One winter evening, the dog went out to play. It was snowing heavily. Soon the ground became white. " The dog never loses his way. Where is he now?" Mrs Green thought. She shouted his name. But still the dog didn't come back. So she telephoned the police and told them a lot about her dog. " My dog is very clever. He always goes out and comes back soon. Sometimes he plays with his friend, Mickey. He can buy a newspaper. _ ." The policeman was tired and said, " I think you'd better put your telephone down. Maybe _ is trying to telephone you now." From what the policeman said"I think you'd better put your telephone down. Maybe  _  is trying to telephone you now." Who do you think "he" means?
Mr Green's husband. The thief who took the dog away. The lost dog. the policeman.