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精英家教網 > 高中英語 > 題目詳情

It is ________ that we'll win the first prize.


  1. A.
    sure
  2. B.
    certain
  3. C.
    sure of
  4. D.
    certain about
B
解析:
sb.作主語時,sure與certain可替換,sth.作主語時用certain.
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