题目内容：

阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式.

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）.