问题标题:
theyhaventfinishedtheirwork.maybetheyhavesometrouble___it.A.onB,atCinDwith为什么是D
问题描述:

theyhaventfinishedtheirwork.maybetheyhavesometrouble___it.A.onB,atCinDwith

为什么是D

程文渊回答:
  固定搭配   havetroublewithsth.
宋宗贤回答:
  havetroublein?
程文渊回答:
  havetroubleindoingsth.
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