问题标题:
【Theythinkthatit'snottheonlywaytosaythanks.错在哪里?】
问题描述:

Theythinkthatit'snottheonlywaytosaythanks.错在哪里?

宋明歆回答:
  Theydon'tthinkthatit'stheonlywaytosaythanks.   此句中否定要前移
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