单项选择题
A．water guns B．lunch boxes C．closed bags D．food bags
A．Food for astronauts must be made in a special way. B．All meat on earth comes in bite - size pieces. C．Astronauts will only eat cakes made from crumbs. D．Astronauts have to go hungry in a spaceship.
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 food or water in a spaceship