单项选择题

Because of a recent obstacle in production, sales have dropped and accordingly profits have ______.

A．declined
B．increased
C．broken
D．promoted
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单项选择题
Tom could hardly ______ his excitement as he knew that he had made a real discovery.
A．conceal
B．reveal
C．show
D．discover
单项选择题
It is our ______ policy that we will achieve unity through peaceful means.
A．consistent
B．considerate
C．certain
D．decisive
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