Kip Keno, an untrained Randi tribesman, was already 28 years old when he made his second Olympic     1    （appear）at the 1968 Mexico City Games. Suffering from violent stomach pain     2     （cause）by a gall bladder(胆囊)infection, Keno entered the 10, 000 m. He was running with the leaders when, with two circles     3     （go）, he doubled up with pain and fell onto the field. He jumped back up and finished the race     4     was canceled the qualification for leaving the track.

Four days later, he earned a silver medal in the 5, 000 m,     5     （leave） Mohamed Gammon of Tunisia behind by narrowly a metre. In the 1,500 m, Keno tried to defeat the finishing kick of the favourite, Jim Ryan, by building up a huge lead. His strategy worked and he     6     （win）by 20 m, the largest advantage of victory in the history of the event.

In 1972, Keno entered the steeplechase(障碍赛)in     7     he had little experience. Still, he was able to defeat teammate Ben Jericho and won another gold medal. Six days     8     this victory, he added a silver medal in the 1, 500 m. Keno and his wife, Phyllis,     9    （eventual）established a children's home and school for homeless     10    （teenager）.