单项选择题

The war has raised questions about the utility of the national guard and reserve organizations, which the Department of Defense finds ______ to U.S. defense needs but which the Congress desires to maintain.

A．ample
B．surplus
C．extra
D．redundant
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单项选择题
The performance of this reasonably priced record player is ______ in quality to that of some more expensive hi-fi sets.
A．comparable
B．comparative
C．compatible
D．competitive
单项选择题
The production of synthetics intensified the drain on energy resources, already sorely pressed by the increase in ______ demand.
A．authoritative
B．aggressive
C．ample
D．aggregate
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