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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President Bush's visit was planned to ______ 30th anniversary of President Nixon's visit to Chin
A．A. depend onB. adhere toC. coincide withD. cling to
单项选择题
City officials are considering building a path to give the public ______ to the site.
A．recreation
B．excess
C．excursion
D．access
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