Eating in space is different from eating on Earth. The food that astronauts carry with them does not look like the food you eat.

Some food is carried in closed bags. It is cooked and frozen before the astronauts get it. All the water is removed from the food. In the spaceship, the astronaut puts the water back. He "shoots" hot or cold water into the food bag with a special （特别的） gun. He eats the food through a small hole in the bag.

Other foods come in bite （一口） sizes. The astronaut puts a whole piece in his mouth at once. There can be no crumbs（碎屑）. Crumbs would float around the spaceship and get in the way. Meat and cake often come in bite-size pieces.

Astronauts cannot drink water from open cups. The water would float in drops into the air. The water is put in the special gun. The astronaut shoots the water into his mouth.

Eating in space is not easy. Astron-auts must learn to eat this way.

10. Some space foods are carried in _______ .

A. water guns B. lunch boxes C. closed bags D. crumbs

11. Why can't astronauts drink water from open cups?

A. Because the water would float out from the open cups.

B. Because the water would spill all over the food.

C. Because crumbs would float in the cups.

D. Because the cups would float in the air.

12. The main idea of the whole story is that _______ .

A. there is more food and water in space than on earth

B. eating and drinking in space is a special problem

C. astronauts can never eat or drink in a spaceship

D. there is no expensive food or water in a spaceship