16．It is said that umbrella was invented over four thousand years ago by Chinese people．A．a B．an C．the D．不填 【查看更多】

 

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It is said that _______ umbrella was invented over four thousand years ago by Chinese people.


  1. A.
    a
  2. B.
    an
  3. C.
    the
  4. D.
    不填

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It is said that          umbrella was invented over four thousand years ago by Chinese people．

A．a                         B．an                        C．the                        D．不填

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