Hello Dora,
The import Joomla! articles buttons will import ALL of you content into K2 categories.
You can import it and then delete the items you do no want or try importing it from the DB.
There are several scripts available in this forum. In your position if we are talking about a few dozen items I would probably import them all and restructure my content.
JoomlaWorks Support Team
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Please search the forum before posting a new topic :)