-11-Jerry is an astronaut. He talks about his life in space:” When you f_1_ go up into space you may get sick for a few days, but then you g_2_ used to it. There is no gravity(重力) in space and you are w_3_. Its fun to float around inside the s_4_. But your body starts to change: your bones and muscles get weaker. You have to do a lot of exercise every day to keep your bones and muscles s_5_. That can be very b_6_. The food is not very interesti
