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    Mr Jones and Mr Brown work in the same office (办公室).One day Mr Jones says to Mr Brown, "I will have a small party at our house on Monday evening. Would you and your wife like to come?"

    Mr Brown says, "Thank you very much. I'd love to, but let me ask my wife first." So Mr Brown goes to the other room and telephones his wife. Then he comes back and looks very worried.

    "What's the matter?" asks Mr Jones. "Is your wife there at home?"

    "No," answers Mr Brown. "She isn't there. My small son answers the telephone. I say to him, 'Is your mother there, David?' and he answers 'No, she isn't in the house.' 'Where is she?' I ask, 'She is somewhere outside (在外面).' 'What's she doing?' 'She is looking for me.'"