单项选择题

In most cases, you have to use the chemicals within ______.

A．limits
B．borders
C．ranges
D．care
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单项选择题
The European Community says it will consider using force ______ is needed for peace keeping in the region.
A．what
B．that
C．such
D．so
单项选择题
The Australian painter is contented with every exhibit on the show, with the indigenous ______ with the exotic.
A．as many as
B．as far as
C．as long as
D．as much as
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