Alice is a young woman. She likes to exercise to keep . She walks five kilometers before breakfast every morning, and goes swimming twice week at the swimming pool. She doesn't smoke and never drinks. She doesn't eat chocolate, and she doesn't eat sweet food.
One day, Alice saw a man in a chair. He had no teeth. He looked very old and weak. , he had a big smile on his face, and his eyes showed his happiness.
Alice thought he was old and clever. She thought he must more than 90 years old, so she asked him about the secret (秘密)of a happy old age.
The man in the said, "My secret for happiness? I smoke every day, and drink three bottles of wine every day. I eat hamburgers, I eat chocolate and I never eat vegetables. I don't walk anywhere play sports. I sit and TV all day."
Alice couldn't understand. She wanted to know how the man got to be so old when did everything wrong. She thought he should be sick and unhappy.
"How are you?" she asked.
"It's my birthday today, "said the man. "I am forty-seven."