From an early age, Parker always said that he would be an astronaut. But no matter  much he studied, worked, and took tests, he never passed. Finally, he (grow) over the maximum(最高的) age for taking the test. He would never be able to realize his dream.

    People (feel)sorry for his dream. Although he (tell) about having to give up his dream, Parker continued training and studying, as though he was going to sit the tests next month.

    He carried this on as he got (old), and when he was a very old man he heard that they were doing some very important medical experiments. For those experiments they needed very old astronaut. Parker, who now walked with a stick, was the only old man in the whole world who was trained to fly in a rocket.

    So Parker found (he) flying in space at last. The experiments were very  (succeed). The knowledge from the experiments helped doctors to cure one of the  (bad)sicknesses for old people, and Parker was celebrated as a hero. Photos of the astronaut with a walking stick and no (tooth) spread all over the world. It showed that persistent effort always brings reward, even though that reward may not be in the form we had first expected.