By the time Michael Phelps retired at 31, he     1     (collect) a total of 23 golds, three silvers and two bronzes at the Olympics, a record     2     looks unlikely to be broken for many years to come. Phelps suffered hyperactivity disorder as a child and     3     (encourage) to take up swimming at seven to control his energy. Over the years he developed into a champion swimmer, beating record after record. “I was trying to see     4     I could really do and where my potential could go”, said Phelps.

Adolph Kiefer, a famous swimmer,     1    (die）at the age of 98 in 2017. Kiefer was America's     2     (old) living Olympic champion. He was the first in the world to break the one-minute mark in the 100-meter backstroke (仰泳) when he was a 16-year-old student. One year later, Kiefer won the gold medal in the 100-meter backstroke competition at the Olympic Games,     3    (set) a record that would stand for 20 years.

Jordan says that the secret to his success is learning     1     his failures. “I can accept failure; everyone     2     (fail) at something. But I can’t accept not trying.” Losing games taught him to practice harder and never give up. In life, Jordan has learned     3     (share) his success with others. The Boys and Girls Club which he started in Chicago     4     (help) young people since 1996.