What do you want to be when you grow up?An astronaut?Itis not an easy thing.An astronaut needs a st

What do you want to be when you grow up?An astronaut?Itis not an easy thing.An astronaut needs a st
An astronaut needs a strong body and mind.You still have a long w_______ to go.
.Before they fly into space,they have lots of practice,Each upside-down training time l______ 20 day.
Astronauts can't get dizzy.A spaceship is not a plane.When it goes up,the gravity can break people's bones.So astronauts must have s_______ bodies for this.They can't get a headache or be sick.
In some spaceships,astronauts aren't just spaceship d______ but also machine repairers and scientists.They have to know every part of the spaceship and how it works.If something goes wrong,they have to know how to repair it.Sometimes they do some scientific experiments in space.
Astronauts need to know how to live in the wild.They take a knife and a gun into space.If they land in forests on the earth when they come back,they can kill off wild animals.