--- You look very tired. at all last night?
--- No, not really. I’m tired out now.
A. Do you sleep
B. Were you sleeping
C. Did you sleep
D. Had you slept
网友回答
A. Do you sleep
B. Were you sleeping
(答案→)C. Did you sleep
D. Had you slept
解析：考查时态。根据时间状语last night说明是对过去情况的说明。因为该行为没有持续到现在，所以不需要使用现在完成时。当然也不会出现过去的过去的过去完成时了。