(C) Many people dream of being an astronaut, but few people succeed in realizing their dream. An astronaut’s daily    27   is quite unique because he works 240 miles above the Earth,     28     the gravity is close to zero. Microgravity not only adds a twist to his work, but also makes his daily life different from    29      of other scientists down on Earth. Normally, besides    30      scientific experiments, he also changes machine parts and keeps the spaceship clean. Since astronauts’ muscles don’t need to   31     their bodies in space, it’s important for them to train their muscles every day. After   32     a lot, they may feel like taking a shower. People may have the idea   33      astronauts take showers every day. However, because the supply of water is limited, they can only take showers   34    . After many hours of work, there is   35     like a nice, long rest.   36     around, they shut themselves in a special space so that they won’t bump into each other in their sleep. Living in space is really quite a unique experience.
【題組】27.
(A)system
(B) aspect
(C) routine
(D) appetite