问题补充：
I haven’t seen you since you came back from holiday. a nice time?
A. Do you have
B. Did you have
C. Have you had
D. Had you had
答案：
A. Do you have
B. Did you have
C. Have you had
(答案→)D. Had you had
解析：考察时态.上文句意:自从你度假回来我就在没有见过你.你过的愉快吗?结合语境可知下文是对过去已经完成的动作的提问,故用过去完成时态,选D.
