阅读下列短文，从每题A、B、C、D四个选项中，选出一个能回答所提问题或完成所给句子的最佳答案。

    Mrs Green lives in a small village. Her husband is dead. But she has a son. He is twenty-one and his name is Jack. He gets work in a town and lives there. Its name is Greensea. It is quite a long way from his mother's village, and she is not happy about this, but Jack says," There isn't any good work for me in the village, mother, and I can get a lot of money in Greensea and give you some every week.

    One day Mrs Green is very angry. She gets on a train and goes to her son's house in Greensea. Then she says to him," Jack, why do you never give me a ring?

    Jack laughs and says," But, mother, you don't have a telephone.

    "No, she says, "I don't have one, but you have one.