单项选择题

The people for the experiment were chosen completely ______.

A．at length
B．in essence
C．at random
D．in bulk
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单项选择题
It can be hard to live up to one's ______.
A．enjoyment
B．evaluation
C．appreciation
D．reputation
单项选择题
City officials am considering building a path to give the public ______ to the site.
A．recreation
B．excess
C．excursion
D．access
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