<p>So…as of right now I can only get one of these books…I currently get some Sentence completions wrong…but my sister gets all most all of them wrong…so i’m wondering which version will be the most beneficial to both of us?</p>
<p>The toughest words since they are tougher meaning you probably don’t know as many of them. I noticed with the core vocabulary they were much easier to memorize and I knew a good amount of them already so the toughest vocab will probably the most beneficial.</p>