________ the warning message, more deaths would have been caused in the village in the earthquake.A.But forB.UnlessC.Regardless ofD.Not
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A解析句意：要不是由于警报信号，这个村里还会有更多的人在这次地震中丧生。But for常用于虚拟语气中，意为：if it were not/hadn't been for...; without要不是因为……；如果没有……。如：①But for the rain, we would have had a nice holiday.要不是因为下雨，我们的假日一定过得很惬意。②But for the safety--belt, I wouldn't be alive today.假若没有安全带，我就活不到今天了。