单选题
As the
seriousness
of the situation slowly became apparent, the crowd"s mood changed from anxiety to hysteria.
【正确答案】
D
【答案解析】[解析] 句意：随着情况的严重性慢慢显现，人们的情绪从焦虑转为了歇斯底里。seriousness严重性；严肃性。gravity严重性；重力。gravid(形)怀孕的，妊娠的。gravitate(动)受重力作用；被吸引。gravitas庄严；沉重。