题目内容：

Paul Lucas can often be seen walking around the city of San Francisco. Sometimes people are surprised to see him walking  1.  any shoes or socks,  2.  Lucas doesn’t mind at all.  3. likes to walk barefoot, and so do 640 other members of Dirty Sole Society, the club that Lucas  4.  (start) years ago. Lucas’ idea for this is to encourage others to live  5.  (free) --- free of shoes.

According to Lucas, the barefoot life has many advantages.  6.   most important is simply that it feels good. He also says  7.  walking barefoot allows you to experience the world directly by touching it with your feet.  8.  addition, the feet do not smell so much because they stay dry,   9.  (make) it hard for bacteria to grow. And, of course, walking barefoot keeps your feet in good shape, so it’s actually   10.  (healthy) than wearing shoes.