单项选择题

It is clear that the whole world is passing through a social revolution in which a central______must be taken by scientists and technologists.

A．process
B．attention
C．measure
D．part
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单项选择题
Unless the workers' demands are______soon, there will be a strike.
A．given
B．met
C．replied
D．permitted
单项选择题
That way of living is______to people in this small part of the country.
A．specific
B．available
C．peculiar
D．particular
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