单项选择题

It is ______ whether Sam will come to attend his best friend's funeral as he has taken the town's money and made off with it.

A．suspicious
B．doubtful
C．dubious
D．unquestionable
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单项选择题
He mentioned it ______ as if it was of no consequence to him.
A．extravagantly
B．presently
C．exquisitely
D．casually
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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