Nowadays, few people form the habit of keeping a supply of candles in the house in case of power ________.

1. A.
   drop
2. B.
   failure
3. C.
   lack
4. D.
   absence

Nowadays, few people form the habit of keeping a supply of candles in the house in case of power            .

       A．drop                   B．failure                 C．lack                    D．absence

 Nowadays, few people form the habit of keeping a supply of candles in the house in case of power_____.

  A. drop   B. failure   C. lack   D. absence