I don't think anyone should ever do a drill of any kind (but especially verbal) and not analyze every answer choice of every questions (wrong or right). You might have guessed an answer choice right or had narrowed down to two answer choices. You might have got an answer choice right for the wrong reason or by eliminating for the wrong reasons. You should analyze all the answer choices because you want to assimilate the kind of reasoning that allows you to accurately eliminate wrong answer choices.
EK 101 for verbal is great, but I recommend getting a verbal practice book from a different company to complement it (I recommend TPR) and work at both of them each day leading up to your exam. It might be a pain to do this, but it's been helping me because TPR has harder passages whereas EK has harder (more realistic) questions.
