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    • Join Date: Oct 2004
    • Posts: 107
    #1

    to infinitive...

    Hi,
    Please check below questions...

    1. It is natural (for/of) a bird to fly.
    2. It is necessary (for/of) us to keep the balance of nature.

    Best regards...
    Last edited by nautes20; 19-Nov-2007 at 14:17.

  1. Hi_there_Carl's Avatar

    • Join Date: Aug 2007
    • Posts: 464
    #2

    Re: to infinitive...

    1. It is natural for a bird to fly.
    2. It is necessary for us to keep the balance of nature.

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