A ________ of murders made the police run here and there, but no murderer was caught．


  1. A.
    series
  2. B.
    numbers
  3. C.
    amount
  4. D.
    set
A
解析：
根據(jù)句意應(yīng)表示“一系列謀殺案”，B項(xiàng)應(yīng)去掉s。
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