单项选择题

For some serious coin collectors, a coin with a different date, mintmark, and even a little ______ in design is counted as a different coin.

A．contrast
B．diversity
C．variation
D．variety
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单项选择题
He might have lost his daughter ______ the timely arrival of the policemen.
A．but for
B．except for
C．besides
D．except
单项选择题
Nancy was surprised that they have ______ . They seemed to be a happy couple.
A．split up
B．broken down
C．fallen through
D．cut off
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