题目内容

He has worked on this problem for thirty minutes, but he still hasn't come ________ its answer．


  1. A.
    to with
  2. B.
    up with
  3. C.
    out with
  4. D.
    with out
B
come up with意为“想出，算出”．
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  1. A.
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  3. C.
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  3. C.
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  1. A.
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  1. A.
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  1. A.
    How do you do?
  2. B.
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  3. C.
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  4. D.
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  1. A.
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  2. B.
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  3. C.
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  4. D.
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  1. A.
    look at
  2. B.
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  3. C.
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