Sample papers on net can provide you with a great help. If you are having any grammar book then it can also help you. According to me sample papers will help you. If then also you are not able to manage then I can tell you how to prepare for unseen passages. Ques./ans. are easy. Just read the passage with concentration and its necessary that your vocabulary is good as you can be asked to either write or choose from the options the synonyms of the words given in passage.