Last night I was watching some news about the American financial crises(金融危机) on TV _______ the power went off.A.whileB.asC.whenD.during
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C解析试题分析：句意：昨天晚上我正看着电视上播出美国金融危机的事情这时突然停电了。空格前后是句子，所以这里缺少连词，故排除D；表示正在做某事突然发生另一件事，只有when有这种用法。考点：考查连词的用法。
点评：本题难度适中。连词是近几年高考的热点，不仅在单选，完形和短文改错中都是常考的知识点，需要考生记住每一个连词的用法，意义及区别。即学即练：_______ the wage of the job was low, there were few applicants for it.A. While B. As C. When D. During解析：B。句意：作为一名初出茅庐的记者，他要了解报界生涯的内幕。