It [sleepiness] filled my brain

It [sleepiness] filled my brain like a cloud. I was going, going...
A、I was almost overcome by sleepiness and would doze off any moment.
B、I was trying hard to beat back sleepiness so that I could keep moving.
C、Due to sleepiness, I was not aware that I had lost my sense of direction.
D、Sleepiness clouded my mind and I was unable to see or hear clearly.
【正确答案】：A
【题目解析】：原句译文：瞌睡使我的脑子如坠云里雾里，我的知觉渐渐模糊，模糊……。B项中努力克服瞌睡（trying hard to beat...）与原文意义相反；C项中失去方向感（lost my...）在原文中没有相关信息：同C项一样，D项中的不能看或者听得清楚（unable to...）的意思在原文没有显现出。答案为A。