填空题

In 1962, John Glenn, at the age of (11) , took a history-making ride (12) Friendship 7 to become the first man to orbit (绕轨道运行) the earth and to walk in space. He did it for science and for his country. Then in 1999, at the age of seventy-seven, Glenn made history again to take the flight back into space.
When asked for (13) on his trip, Glenn said, "Old folks have ambitions (志向) and (14) , too, like everybody else and why don’t they work for them Why don’t they (15) it Don’t sit on a couch (长沙发) someplace, that’s my attitude."