52..The train _________ for twenty minutes.  A.leftB.has leftC.is leavingD.has been away

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52..Thetrain_________fortwentyminutes.  A.leftB.hasleftC.isleavingD.hasbeenaway52..Thetrain_________

52..The train _________ for twenty minutes.  A.leftB.has leftC.is leavingD.has been away
52..The train _________ for twenty minutes.
  A.leftB.has leftC.is leavingD.has been away

52..The train _________ for twenty minutes.  A.leftB.has leftC.is leavingD.has been away
相信自己,你的答案是对的.因为LEAVE 是终止性动词,其现在完成时的肯定句要改为持续性动词才能与FOR 短语连用

D For+时间段常和完成时连用,而且表示的状态,所以选D
B表示的事动作

D
leave是非延续性动词,不能和时间段连用