问题补充:
.In this experiment, they are woken up several times during the night, and asked to report what they____.
A. had just been dreaming
B. are just dreaming
C. have just been dreaming
D. had just dreamt
答案:
A. had just been dreaming
B. are just dreaming
(答案→)C. have just been dreaming
D. had just dreamt
解析:dream是从过去某时开始一延续到are woken up...and asked to report...这一现在动作之前的动作,故用现在完成进行时。