问题标题:
Thewheelisthoughttobe____inventionofthefistimportancein____humanhistoryAan,theBan,/Cthe,theDthe,/,
问题描述:

Thewheelisthoughttobe____inventionofthefistimportancein____humanhistory

Aan,theBan,/Cthe,theDthe,/,

常会友回答:
  特定的哪一个用定冠词the,这里专门指thewheel   inhumanhistory在人类历史上固定词组搭配
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