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-I'm so sorry that you didn't win the skating marathon.
-How long _____ you ______?
-I skated for 5 hours.
A.have, been skatingB.were, skating
C.have you skatedD.did, skate
D

试题分析: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
点评:动词的时态是学习英语过程中非常重要的知识。现在完成时表示动词在过去发生对现在造成的影响。现在完成时往往和already,yet,for+一段时间,since+点时间的时间状语连用。一般过去时只表动词在过去发生,一般现在时表示习惯性的动词或是客观真理、事实。
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