单选题
The hum of conversation _______ as the chairman mounted the rostrum.
A、
died out
B、
died off
C、
died of
D、
died away
【正确答案】
D
【答案解析】
die out灭绝，消失；die off相继死去直至死光；die of死于；die away(声音等)逐渐消失。
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