when i gave the GRE & GMAT i would have killed to get only passages from the sciences like chemistry or biology, they do tend to have structures to them. i agree the terms get complicated, but often times the more complicated and longer they are the simpler the questions tend to be.
my personal weakness used to be the philosophy ones. not sure how well you deal with those.
on my GRE, the third or fourth question i got was an RC about aristotelian philosophy and its application to management of national parks and recreational centres ... honest to God i never got beyond line 5 of that paragraph, it was (ironically enough) all greek to me.
and then on the GMAT, i got this one on some book written by an asian female and how it subversively described the political climate of and the the role of feminism in 19th century Indian society or some cr@p like that .... again hopeless, no clue what they were going on about. Plus it was long .. I mean like >1 screen long
If it comes to reading ... I would def read some philosophy journal to get a hang of stuff like that
I think I have read the name of a journal recommended somewhere on these forums, but it just isnt coming to my head right now