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精英家教網 > 高中英語 > 題目詳情

They were surprised that a child should work out the problem________they themselves couldn't.


  1. A.
    once
  2. B.
    then
  3. C.
    while
  4. D.
    if
C
解析:
由語境可知,兩個分句的意義表示轉折對比,故只能選擇while,其余各項或者句意不通或者結構錯誤。題意:令他們吃驚的是,一個孩子能夠做出的題目,而他們自己竟做不出來。
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