阅读短文，完成以下小题。

    Joy always rides her bike to school. It's four miles from her house to school and it takes her about fifteen minutes. Joy likes riding to school. She says it's good for her health. Edward usually goes to school by bus. He likes talking with his friends on the bus. It's about ten minutes' ride to school by us. Mary's home is near the school. She usually walks to school. It's about five minutes' walk. Mary says she likes taking walk after supper.