完形填空If you have been dreaming of becoming an astronaut after

完形填空
If you have been dreaming of becoming an astronaut after you grow up ,get start now!An astronaut needs a strong body and mind Shenzhou 5 astronauts are able to live upside-down.They do this not just during sleep,but also when eating and going to the toilet.Before they__1__the space,they had lots of practice.Each upside-down training time lasted 20 days.
Chinese astronauts aren’t just spaceship__2__but also machine repairers and scientist.
1 A.went through B.flew into C.stayed at D.lived at
2 A.teachers B.coaches C.inventor D.drivers