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精英家教網 > 高中英語 > 題目詳情

_________ is known to all,good friends _________ happiness and value to life.?


  1. A.
    It; add
  2. B.
    As; add
  3. C.
    It; add up
  4. D.
    As; add to
B
解析:
as引導的定語從句修飾整個主句; add to sth."使增加,使增強"; add sth to sth. "把……加到……里邊"; add up to"總計是……"。因句中已有介詞to,所以只能選B。
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