题目内容

As we all know, Jack is experienced ______ the problem of this kind.


  1. A.
    to work out
  2. B.
    at working
  3. C.
    at working out
  4. D.
    for working out
A
考查短语be experienced at在某方面有经验。At是介词后面接名词或者动名词。句意:众所周知,杰克在解决这方面的的难题上有经验。Work out解决,算出,故选A。
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