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My parents live in a small village.They ...

My parents live in a small village.They always keep candles in the house___there is a power cut.

A.if

B.unless

C.in case

D.so that

 

C 【解析】根据句意可知留蜡烛在家里是为了以防万一停电。in case意为“以防万一”;if 引导条件状语从句,意为“如果”;unless引导让步状语从句,意为“如果不”;so that引导目的状语从句,意为“为了”。
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