Nowadays, few people form the habit of keeping a supply of candles in the house in case of power ________.A.dropB.failureC.lackD.absence
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B解析句意：现在很少人会为防备意外断电而在家里存许多蜡烛。failure--state of being inadequate; not functioning as is expected or required不足、缺乏、失灵、故障；lack--absence or shortage (of sth that is needed)（所需事物的）缺乏，短缺；drop作名词时常用单数形式，意为decrease下降；lack--non--existence缺乏，不存在。