单项选择题
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
A．water guns B．lunch boxes C．closed bags D．food bags
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.