问题

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

正确答案是：

同类题型

Over the last three decades, the number of people participating in physical fitness programs sharply.

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e million people of the city,________thought little of these events , _______to bed as usual that night .

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