(1) some of the greatest success stories in american history began with failure. (2) take
the case of sally ride. (3) when ride was a young girl in encino, california, her goal
was to become a professional tennis player. (4) she dropped out of college and practiced
hard to become a tennis pro. (5) in time, she realized that she would never be good
enough to compete with the best tennis players. (6) she returned to college and studied
astrophysics.
(7) one day in 1977, while working on her ph. d. at stanford university, ride read that
nasa was looking for astronauts. (8) she applied and was one of six women accepted
into the space program. (9) ride trained to be an astronaut longer and harder than she
had ever done anything in her life. (10) by the early 1980s, she was part of the space
shuttle program. (11) in 1983, as a member of the crew of the space shuttle challenger,
sally ride became the first american woman to journey into space.
(12) ride was getting ready for another mission when the challenger exploded in 1986,
killing the whole crew. (13) one of them was a new hampshire high school teacher
named christa mcauliffe. (14) ride was appointed to a special commission that
investigated the tragic accident. (15) a year later she retired from nasa and returned to
california, where she taught college. (16) since then, she has been involved in several
organizations that encourage girls who are interested in science and math.
1. which sentence does not belong in the selection?
a. sentence 4
b. sentence 6
c. sentence 13
d. sentence 15