单项选择题

A．It helps people work efficiently.
B．It’s more refreshing than soda.
C．It should be drunk in moderation.
D．It has less flavor than tea.
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单项选择题
A．Sixteen below zero.B．Six below zero.C．Sixteen above zero.D．Six above zero.
A．Sixteen below zero.
B．Six below zero.
C．Sixteen above zero.
D．Six above zero.
单项选择题
A．The Helicopter.B．The Advantages of the Helicopter.C．The Disadvantages of the Helicopter.D．The Uses of the Helicopter.
A．The Helicopter.
B．The Advantages of the Helicopter.
C．The Disadvantages of the Helicopter.
D．The Uses of the Helicopter.
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