题目内容
People living in the area where there is a lack of electricity often keep a supply of candles_______power failure.
A.in case of B.once C.even if D.in course of
A
解析:
判断逻辑。此处为目的,in case of 意义为“万一……”,in course of “?在……?过程中”,once 是连词,用在此处句意不通。
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