I while watching the movie 2012 last night. Unluckily, my roommate woke me up.
A. had fallen asleep
B. have fallen asleep
C. fell asleep
D. fall asleep
网友回答
A. had fallen asleep
B. have fallen asleep
(答案→)C. fell asleep
D. fall asleep
解析：考查时态.根据时间状语last night可知描述的是过去发生的动作,故用过去时态,选C.