题目内容

My parents live in a small village. They always keep candles in the house __________ there is a power cut.
A．ifB．unlessC．in caseD．so that
C。
in case意为“以防万一”，又如：I bought the car at once in case he changed his mind. 我马上买下了那辆汽车，以免他变卦。I don’t let him climb trees in case he tears his trousers. 我不让他爬树，以免撕破裤子。
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