单项选择题

We spent the day ______through forests and over mountains.

A．drudging
B．dribbling
C．trekking
D．thumping
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单项选择题
Napoleon was ______at the battle of Waterloo in 1815.
A．sublimated
B．interspersed
C．vanquished
D．interposed
单项选择题
All parts of this machine are______, so that it is very simple to get replacements for them.
A．specialized
B．standardized
C．minimized
D．modernized
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