When Alice came to she did not know how long shethere.A. had been layingB. has been lying

问题补充：

When Alice came to, she did not know how long shethere.

A. had been laying

B. has been lying

C. was laying

D. had been lying

答案：

A. had been laying

B. has been lying

C. was laying

(答案→)D. had been lying

解析：考查时态。句意：当Alice醒过来的时候，她不知道她在那里躺了多久了。根据句意说明当她醒过来的时候，这是一个过去的时间，那么她躺在那里很久是在这之前就发生的事情，故使用过去完成时的形式。故D正确。