hard CR exercises

<p>hello,
which books have harder CR exercises than actual one is?
I've written BARRON's diagnostic test and official practice test. latter seemed to me harder.
maybe I'm mistaken. </p>

<p>thanks</p>

<p>Get the Barron’s SAT Critical Reading Workbook. Every type of question has exercises divided by difficulty and the hard ones are REALLY HARD.</p>