It was several minutes before I was of what was happening.
A. aware
B. accused
C. tired
D. a shamed
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(答案→)A. aware
B. accused
C. tired
D. a shamed
解析：词组辨析题。be aware of 意识到， be accused of 控诉，be tired of 厌烦be ashamed of 羞愧 句意：几分钟后我就意识到发生的事情了。根据语境选A.。