Sorry to have kept you waiting. You must have thought .
A. we are not ing
B. we were not ing
C. we did not e
D. we were not e
网友回答
A. we are not ing
(答案→)B. we were not ing
C. we did not e
D. we were not e
解析：句意：抱歉让你等了那么久。你一定认为我们不会来了。Must have thought“过去一定认为”，后面的宾语从句用过去将来时，选B。