| inhalen acquire
Explanation:
As it is a professional level question, I think that 'catch up' is a little too informal and you are then saddled up with 'with with to catch up' which is a uncomfortable phrase combining correct grammar with an informal expression - rather incongruous in a professional text.
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Note added at 1 day12 hrs (2008-12-02 09:50:49 GMT) Post-grading
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In reply to Jarry's last comment, I tend toward Lianne's remark that it should have been 'binnenhalen': that makes more sense in the original sentence than 'inhalen'. If that is the case, depending on the meaning of the rest of the text, then 'acquire' should be good.
Example sentence(s):- Such technological know-how is not so easy to acquire.
|  Jennifer Barnett
France
Local time: 23:14
Native speaker of:  English
PRO pts in category: 4
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The translation workplace 
peer agreement (net): +6