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10.I was spending my holidays at the time,so I have no idea how it       .(  )
A.was happeningB.happenedC.happensD.has happened

分析 当时我正在度假,所以我不知道它是怎么发生的.

解答 答案是B.考查时态,根据句意,事情发生的时候我正在度假,用的是过去进行时,所以事情的发生是过去的时间,所以要用过去时,故答案选B.

点评 高考题目对时态的考查是重点,谓语动词要与时间状语保持一致,时态与时间是密不可分的,各种时态却要受到时间和语言环境的限制,根据题干提供的时间或者时间状语体现的时间来判断句子的时态是最直接的解题方法,扎实的语法功底加上准确的理解至关重要.

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