She keeps a supply of candles in the house in case of power _________.

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

She keeps a supply of candles in the house in case of power _______.

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

She keeps a supply of candles in the house ________ power failure．

1. A.
   because of
2. B.
   in case of
3. C.
   so as to
4. D.
   instead of