单项选择题

The local health organization is reported ______ twenty-five years ago when Dr. Audon became its first president.

A．to be set up
B．being set up
C．to have been set up
D．having been set up
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单项选择题
More than one third of the Chinese in the United States live in California, ______ in San Francisco.
A．previously
B．predominantly
C．practically
D．permanently
单项选择题
The board deemed it urgent that these files ______ fight away.
A．had to be printed
B．should have been printed
C．must be printed
D．should be printed
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