单项选择题

A．The cafeteria isn’t open to guests.
B．They have to pay for at least seven meals.
C．They have to wait until all the students finish their meals.
D．They can buy their meals when they eat.
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单项选择题
A．Having selected food types.B．Eating vegetables and fruits.C．Eating as much as possible.D．Having all food types in proper proportions.
A．Having selected food types.
B．Eating vegetables and fruits.
C．Eating as much as possible.
D．Having all food types in proper proportions.
单项选择题
A．As young as possible.B．2C．3D．5
A．As young as possible.
B．2
C．3
D．5
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