If these are your only choices, I'll chose TPR science workbook (if you could somehow get your hands on that) or the EK 1001 Bio. I personally haven't used either, but from suggestion others have given these two were great. If your talking about Review books... EK is thin and is only good if you need a quick breeze through after knowing the content (otherwise great) whereas TBR and TPR are more thorough reviews but will take a long time to read (hard if you are planning to take the test soon).
Economically, I'll chose EK if you just want bio practice b/c they are relatively cheap... but if you want a good holistic practice book for all sciences, I'll try to find a princeton review science workbook from a friend or ebay.