单项选择题

A．Water from inland seas.
B．Rainwater.
C．Sewerage.
D．Water from mountain streams.
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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.
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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