－I'm so sorry that you didn't win the skating marathon.
－How long you ?
－I skated for 5 hours.
A. have, been skating
B. were, skating
C. have you skated
D. did, skate
网友回答
A. have, been skating
B. were, skating
C. have you skated
(答案→)D. did, skate
解析：句意：你没有赢得滑冰赛，我很难过。你已经滑了多久了？5小时。题中用了I skated for 5 hours表示动词的过去时表示动作在过去发生，所以问的时候也用一般过去时不用现在完成时，故选D