问题标题:
therearetwo()inthecityAcar'factoryBcar'sfactoriesCfactoriesofcar'sDcarfactories
问题描述:

therearetwo()inthecity

Acar'factoryBcar'sfactoriesCfactoriesofcar'sDcarfactories

韩延彬回答:
  Dcarfactory是固定词组,复数变化在factory上面
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