单项选择题
A．The water would come from the open cups. B．The water would spill all over their food C．Crams would float in the cups D．The cups would float in the air.
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.