题目内容：

课文原词填空

In 1983, he joined the army, and went to flight school He graduated in 1987 and became a 1., In 1998, he2. to be a member of Project 921, which is now called Shenzhou. He was one of the only 14 3. from 1,500 candidates. The team spent the next five years being trained. They not only studied all the subjects4.to be an astronaut, but also learnt5. skills and all about how spaceships and rockets are built. Yang 6. among the very top in the everything the group studied.