.the manager had fallen asleep where he ______,without undressing .这道题选B,为什么用这样的时态呢?这有什么样的知识点呢?A.was laying，B. was lying ．C. had laid D. had lied

.the manager had fallen asleep where he ______,without undressing .
这道题选B,为什么用这样的时态呢?这有什么样的知识点呢?
A.was laying，B. was lying ．C. had laid D. had lied

选项呢