单项选择题

In this factory the machines are not regulated ____________ but are jointly controlled by a central computer system.

A．independently
B．individually
C．irrespectively
D．irregularly
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单项选择题
When a number of people ____________ together in a conversational knot, each individual expresses his position in the group by where he stands.
A．pad
B．pack
C．squeeze
D．cluster
单项选择题
For him (to be re-elected), what is essential is not that his policy (works), (but that) the public believe that it (is).
A．to be re-elected
B．works
C．but that
D．is
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