There's some good advice above, but I'll also mention that the standard error of your official GMAT score is higher than a lot of people think - it's something like 30 points. That means that the GMAC only promises to give you a score within 30 points of your actual ability level. I can only assume that the deviation on a non-official practice test would be higher. So I wouldn't panic about one practice test at the 690 level, especially in light of your multiple 700+ practice tests. The truth is
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