单项选择题

Not once in these years ______ the prices of these products.

A．we changed
B．have we changed
C．did we change
D．we have changed
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单项选择题
The film brought the hours back to me ______ I was taken good care of in that far-away village.
A．until
B．that
C．when
D．where
单项选择题
______ of us can do everything, but all of us can do something.
A．Everyone
B．Any
C．None
D．Some
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