超级简单英语阅读:Who Is It?（在线收听）

Joseph never opens the front door. When someone knocks on the front door, Joseph says, “Who is it?” But he does not open the door. His parents told him to keep the door closed. His parents want him to be safe. He will be safe if he doesn’t open the door. Yesterday someone knocked on the front door. “Who is it?” Joseph asked. “It’s the mailman,” the person said. “I cannot open the door,” Joseph said. “Okay, I will come back tomorrow,” the mailman said. “Goodbye,” Joseph said. Joseph is a good boy. He listens to his parents. He doesn’t open the door for any person.