GRE English Subject Test -- resources for grammar questions, myth references?

[carverb743]

I'm taking the GRE Subject Test and I was surprised to see how many mythological references and grammar questions were on the practice test -- I've been using the Princeton Review book, Vade Mecum, and the Norton editions, but does anyone have a reference for a site that deals with that kind of advanced grammar that might be a good resource -- or to put it differently, how did you all prepare for the grammar questions on the GRE? Also curious as to whether there's a good online site -- Vade Mecum is lacking in this component -- for mythical figures for allusions: the Princeton review's Greek Gods sheet doesn't really get to much classical literature in summary form, which is what I'm looking for. Would be super grateful for pointers if anyone has them. Thanks!