单项选择题

Some space foods are carded in ______ .

A．water guns
B．lunch boxes
C．closed bags
D．food bags
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单项选择题
Which of the following does the story lead you to believe
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.
单项选择题
Why can't astronauts drink water from cups
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.
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