单选题
Although a solemn tone was appropriate to the seriousness of the occasion, the speaker lapsed into ______ which was depressing rather than moving.
【正确答案】
D
【答案解析】(morbidity病态，不健康)。句意为：尽管严肃的语气适合于该场合的严肃性，但是发言人逐渐陷入了不是感人而是让人压抑的、不健康的状态中。A．reverence尊敬；B．frankness坦率；C．levity轻浮。