Martin_____ for the whole afternoon.When he woke up,he just sat still,knowing nothing about the lessons

问题描述:

Martin_____ for the whole afternoon.When he woke up,he just sat still,knowing nothing about the lessons
A.had been sleeping
B.has been sleeping
C.had slept
D.has slept

A 睡在醒之前所以过去完成时,强调一直用进行时,所以过去完成时