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
The indoor swimming pool seems to be a great deal more luxurious than ______ .
A．is necessary
B．being necessary
C．to be necessary
D．it is necessary
单项选择题
By the year 2000, production in the area is to double ______ of 1990.
A．that
B．it
C．one
D．what
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