Looking for a challenge, my friend? I've picked out the very hardest text completion question from ETS's Official Guide to the GRE. Only about 10% of people got it right... will you?
Decide what the descriptive clue(s) are, and make sure the word you pick necessarily matches that clue.
(question removed for copyright reasons, but it's the one about in the Official Guide about sartorial).
Check out my other free GRE resources.