I while reading the English textbook. Luckily, my roommate woke me up in time !

I ______ while reading the English textbook. Luckily, my roommate woke me up in time !

A. had fallen asleep       B. have fallen asleep       C. fell asleep    D. fall asleep

试题答案

C

解析:

根据woke(wake 的过去式)可以判断，这里谈论的与“现在”无关，因此可以排除B和D两项。I是在读书期间睡着的（while reading）,而不是在之前睡着的，所以A项也是不恰当的。