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
