His mother always keeps a candle in the house ______ there is a power cut.

题目

His mother always keeps a candle in the house ______ there is a power cut.
a、in case
b、in the case
c、in the event
d、in event of
我厚着脸皮、再问一次、、555

答案

a
in case 以防万一
in the case后面不能加句子