In my opinion, anyone who didn't improve on reading comp after a review course didn't try.
With that said, just start reading scientific journal articles, one per day. Focus on speed reading, and getting the jist... noticing words that jump out at you - either because you don't know what they mean, or they are the key topic of the paragraph.
If you read one scientific article per day, you WILL improve your reading skills. You'll get faster and better at spotting weird stuff that you can predict what questions will be asked. Predict the questions as you scan the article.
Trust me, just practice and have confidence. You'll surprise yourself on test day. Even if you don't think you've improved come time for the test... you'll surprise yourself!
Good sites are Google Scholar (any article will do, just get the free ones) and if you're still in college, your school library should have online access to scientific journals that is free to you. Reading online is key since the test is on a computer screen.
Good luck!