The old man keeps a supply of candles in case of power __________shourage failures lack absence 选哪个,

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The old man keeps a supply of candles in case of power __________
shourage
failures
lack
absence
选哪个,

failures ,power failures 是停电的意思

选B,power failures是电力故障,停电的意思。所以老人要备蜡烛。