阅读短文，回答下面的问题。

    Mr Brown lived in a small town, but he worked in a big city. So he moved there with his wife and two children last Tuesday. The next day, Mr Brown was washing his new car. When a friend came, the friend stopped and looked at the new car for a minute. Then Mr Brown turned and saw him. The friend said, "That's new car is yours?" "Sometimes," Mr Brown answered. The friend was surprised. "Sometimes?" he asked, "What do you mean?" Mr Brown answered slowly, "Well, when there is a party in town, my daughter Jean drives it. When there's a football game. It's my son Joe's turn. When I wash it and it looks really nice and clean. My wife Linda uses it. And when it needs cleaning, it's mine. "