请观察下边两幅人物及其活动的照片。它们所包含的历史主题应该是（   ）   

    Mr Jones and Mr Brown work in the same office. One day Mr Jones says to Mr Brown, “We want to  have a small party at our house next Wednesday evening. Do you and your wife want to come ?”

    Mr Brown says, “Thank you very much. I must phone my wife and ask her.” So Mr Brown goes to the other room and makes a telephone call. When he comes back, he isn't happy.

    “Why are you not happy?” asks Mr Jones, “Do you speak to your wife?”

    “No, She isn't at home. My little son answers the phone. He says she is looking for him outside(在外面) .”