一道英语选择题（分析）I_____while reading the English textbook.Luckily,my roommate woke me up in time!A.had fallen asleep B.have fallen asleepC.fell asleep D.fall asleep
问题描述：
一道英语选择题（分析）
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
答
选C...while前面只能用一般时或进行时,而且后面的woke是过去的标志,所以前后统一,用fell