When Alice came to, she didn’t know how long she there.
A. had been lying
B. has been lying
C. was lying
D. has lain
网友回答
(答案→)A. had been lying
B. has been lying
C. was lying
D. has lain
解析：句意：当Alice到达时，她不知道自己在那里躺了多久了。指从“过去的过去”某一个时间点开始的动作或状态，一直延续到过去，用过去完成进行时，选A。