30-Mar-2008, 13:30
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 | Moderator | | Join Date: Feb 2003 Country: USA
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 Re: The use of articles in "what" questions
My opinion: It is a portofolio because a portfolio is an object, a thing. (It's tangible.) On the other hand, you can omit the article with extrapolation because extrapolation is an intangible.
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