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A computer can only do ____ you have instructed it to do


  1. A.
    how
  2. B.
    after
  3. C.
    what
  4. D.
    when
C
解析:
主要測試賓語從句。由題干可知句子中兩個動詞do均需要賓語的,只不過第一個接的是賓語從句;而第二個接的是賓語。另外再結合所給答案可知what為最佳答案。譯文:一臺計算機只能你指示它去做的事情。
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