单项选择题

______ will be given to the doctoral candidates who are registered in their last year of study and who are attending a major professional meeting.

A．Promotion
B．Preference
C．Precaution
D．Priority
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单项选择题
Tom' s steps had ______ and there was a moment of absolute silence.
A．died down
B．died from
C．died away
D．died out
单项选择题
The prices of all the shares fell sharply just after a few ______ when the news came that the war had broken out.
A．transports
B．transmissions
C．transitions
D．transactions
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