Mrs Green lives in a small village. Her husband is dead, but she has one son. His name is Jack. He is twenty-one. He worked in a shop in the village and lived with his mother, but then he finds a job in a faraway town named Green Sea. He goes and lives there. Mrs Green is not happy about it. One day Mrs Green is angry. She gets on a train and goes to her son's house in Green Sea. Then she says to him, "Jack, why do you never telephone me?" Jack smiles, "But, Mother, you don't have a telephone." "No," she answers, "I don't have, but you have one!" Jack doesn't telephone his mother because  _  .
he doesn't like her he can see her every day he has no telephone his mother has no telephone