When you talk about astronauts，maybe you want （1）

to know

to know

（know） how they live in space．Many people think their lives are very interesting．Life in space is pretty different（2）

from

from

that on the earth．
    In the past，astronauts （3）

could

could

（can） eat only small pieces of dried food．But now astronauts are able to eat（4）

more

more

（much） everyday food like fruit，vegetables and icecream than before．
    All the people in the ISS（国际空间站）have their own rooms．They have to tie（系）（5）

themselves

themselves

（they） to their beds，or they'll fly away!That seems like （6）

a

a

strange way to sleep，but astronauts say sleeping in space is （7）

really

really

（real） not too bad．
    Exercising is very important in space．Astronauts exercise on bikes and other machines（8）

for

for

about two hours every day．That way，they can still be （9）

healthy

healthy

（health） when they get back home．
    Astronauts are hardworking whether in space or on the earth． （10）

Although/Though

Although/Though

the work sometimes is difficult，they are still interested in it and love the job．