Anyway, the crowd around me were obviously enjoying their day out at the races, ________ by their happy faces and the sense of excitement．A.observingB.judgingC.consideringD.inferring
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B解析judging by“根据……判断”。句意为“根据他们高兴的面孔和激动的情绪可判断出我周围的人都喜欢出来看这场比赛”。所给的三个干扰项中的非谓语动词都表示主动，都指人们正在做的事，容易被排除。