I felt yesterday evening and then I fell quickly. A. sleeping; asleepB. asleep; sleepyC.

问题补充：

I felt yesterday evening, and then I fell quickly.

A. sleeping; asleep

B. asleep; sleepy

C. sleepy; asleep

D. sleep; sleepy

答案：

A. sleeping; asleep

B. asleep; sleepy

(答案→)C. sleepy; asleep

D. sleep; sleepy

解析：sleep动词，睡觉；asleep可作形容词和副词，睡着的，熟睡的；sleepy欲睡的，困乏的。句意：昨晚我感到很乏，让后我就快速的睡着了。结合语境可知前文feel为系动词，后面接形容词做表语，下文fall为行为动词，后面接副词作状语。故选C。