问题标题:
【.Justafterputtingawaythedishes_______..thedoorbellrangB.NancyheardthedoorbellringC.thedoorbellwasrungD.someoneknockedatthedoor】
问题描述:

.Justafterputtingawaythedishes_______.

.thedoorbellrangB.Nancyheardthedoorbellring

C.thedoorbellwasrungD.someoneknockedatthedoor

崔光照回答:
  B.Nancyheardthedoorbellring   Nancy同时也是前面分词短语的逻辑主语
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