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    • Member Info
      • Native Language:
      • Greek
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      • Greece
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      • Greece

    • Join Date: Sep 2014
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    #1

    it's difficult not _________

    "it's difficult not......what to do.
    a. to know b. knowing"

    I would choose 'b' but I can't relate it to a grammar rule. Instead, we say "it's difficult to do sth". But why is the correct answer 'b' in this example?

  1. MikeNewYork's Avatar
    • Member Info
      • Native Language:
      • American English
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      • United States
      • Current Location:
      • United States

    • Join Date: Nov 2002
    • Posts: 24,983
    #2

    Re: it's difficult not _________

    Both answers work for me.

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