It is Jim's birthday today. He is five years old. He gets many nice birthday presents from his family and one of them is a big drum . "Who gives him the drum?" his father asks. "His grandfather does." answers Jim's mother. Jim likes his drum very much. He makes a noise with it, but his mother doesn't say anything about it. His father is not at home. He is working in a school. So he doesn't hear the noise. But one of the neighbors doesn't like the noise at all. So one morning she takes a knife and goes into Jim's room. Jim is making a noise with the drum. She says to him, "Hello, Jim. Do you know there is something very nice in your drum? Here's a knife. Open the drum and let's find it." Jim's father is  _  .
a worker a teacher a cleaner a shop assistant